All
Search
Images
Videos
Shorts
Maps
News
More
Shopping
Flights
Travel
Notebook
Report an inappropriate content
Please select one of the options below.
Not Relevant
Offensive
Adult
Child Sexual Abuse
Top suggestions for External Torx
Torx
Driver
Box Wrench
Set
Metric Torx
Bit Sizes
Torx
Wrench
Torx
Security
Torx
Screwdriver
Torx
Set
Torx
Specifications
Torx
Screw Chart
Titan
External Torx
Best Torx
Sockets
Torx
Bit Driver
Torx
Socket Set
Torx
T10
Torx
Sizes
Torx
Driver Head
Torx
Star Bit Sizes
Length
All
Short (less than 5 minutes)
Medium (5-20 minutes)
Long (more than 20 minutes)
Date
All
Past 24 hours
Past week
Past month
Past year
Resolution
All
Lower than 360p
360p or higher
480p or higher
720p or higher
1080p or higher
Source
All
Dailymotion
Vimeo
Metacafe
Hulu
VEVO
Myspace
MTV
CBS
Fox
CNN
MSN
Price
All
Free
Paid
Clear filters
SafeSearch:
Moderate
Strict
Moderate (default)
Off
Filter
Torx
Driver
Box Wrench
Set
Metric Torx
Bit Sizes
Torx
Wrench
Torx
Security
Torx
Screwdriver
Torx
Set
Torx
Specifications
Torx
Screw Chart
Titan
External Torx
Best Torx
Sockets
Torx
Bit Driver
Torx
Socket Set
Torx
T10
Torx
Sizes
Torx
Driver Head
Torx
Star Bit Sizes
Shop external torx
Sponsored
$12.95
C23 547 E14 External Torx Socket
Freedom Racing Tool and Auto, LLC
$12.95
C23 547 E14 External Torx Socket
Freedom Racing Tool and Auto, LLC
$32.99
Yuesstloo Torx Plus Socket Set, External Torx Plus 6 Point EP Socket EP4 - EP32 19Pcs With 1/2'' 3/8'' 1/4'' Dr, Replacement For E-TORX Socket Set,
Amazon.com
99
$32.99
Yuesstloo Torx Plus Socket Set, External Torx Plus 6 Point EP Socket EP4 - EP32 19Pcs With 1/2'' 3/8'' 1/4'' Dr, Replacement For E-TORX Socket Set,
Amazon.com
99
$24.99
VEVOR Torx Bit Socket And External Torx Socket Set 31-Piece T8-T70 And E4-E24 S2 Alloy Steel And Cr-V Steel 1/4 in 3/8 in And 1/2 in Drives With
VEVOR
33
$24.99
VEVOR Torx Bit Socket And External Torx Socket Set 31-Piece T8-T70 And E4-E24 S2 Alloy Steel And Cr-V Steel 1/4 in 3/8 in And 1/2 in Drives With
VEVOR
33
$12.95
C23 548 E16 External Torx Socket
Freedom Racing Tool and Auto, LLC
$12.95
C23 548 E16 External Torx Socket
Freedom Racing Tool and Auto, LLC
$25.99
HAKUWI 19-Piece External Torx Plus Socket Set, Ultimate Star Socket Set, 6 Point EP Socket 1/2'' 3/8'' 1/4'' Dr EP4-EP32,5 Point EP Socket 1/2'' EP8.8
Amazon.com
8
$25.99
HAKUWI 19-Piece External Torx Plus Socket Set, Ultimate Star Socket Set, 6 Point EP Socket 1/2'' 3/8'' 1/4'' Dr EP4-EP32,5 Point EP Socket 1/2'' EP8.8
Amazon.com
8
$11.99
14-Piece Female E-Torx Star Socket Set With Magnetic Storage Rail, 1/4", 3/8", 1/2" Drive E4 - E24 External Impact Socket Set, Chrome Vanadium Steel,
Amazon.com
70
$11.99
14-Piece Female E-Torx Star Socket Set With Magnetic Storage Rail, 1/4", 3/8", 1/2" Drive E4 - E24 External Impact Socket Set, Chrome Vanadium Steel,
Amazon.com
70
$20.65
Proto Impact Socket: 1/2 in Drive Size, Torx, E20 Socket Size, External Torx, Std, Black Oxide Model: J7420TX
Grainger
$20.65
Proto Impact Socket: 1/2 in Drive Size, Torx, E20 Socket Size, External Torx, Std, Black Oxide Model: J7420TX
Grainger
$79.99
Grey Pneumatic 3/8Dr 9Pc External Torx Set, GRE1219ET
Advance Auto Parts
$79.99
Grey Pneumatic 3/8Dr 9Pc External Torx Set, GRE1219ET
Advance Auto Parts
$259.17
GEARWRENCH 84 Pc. 1/4", 3/8" & 1/2" Drive Hex/Ball End Hex/Tamper Proof Torx®/External Torx®/Torx® SAE & Metric Bit Set | Part 80742
MSC Direct
1K+
$259.17
GEARWRENCH 84 Pc. 1/4", 3/8" & 1/2" Drive Hex/Ball End Hex/Tamper Proof Torx®/External Torx®/Torx® SAE & Metric Bit Set | Part 80742
MSC Direct
1K+
$11.31
DT-48285 Valvebody E10 External Torx Plus Socket GM-48285
Freedom Racing Tool and Auto, LLC
$11.31
DT-48285 Valvebody E10 External Torx Plus Socket GM-48285
Freedom Racing Tool and Auto, LLC
$43.20
Seco Driver For Indexables: T9 Torx & Torx Plus Drive - For Drivers | Part 16697
MSC Direct
$43.20
Seco Driver For Indexables: T9 Torx & Torx Plus Drive - For Drivers | Part 16697
MSC Direct
$14.99
Yuesstloo E-Torx Socket Set, 14 Piece Female E-Torx Star Socket Set, 1/4" 3/8" 1/2" Drive, E4 To E24 External Torque E Socket Set, 14Pcs Star Socket
Amazon.com
148
$14.99
Yuesstloo E-Torx Socket Set, 14 Piece Female E-Torx Star Socket Set, 1/4" 3/8" 1/2" Drive, E4 To E24 External Torque E Socket Set, 14Pcs Star Socket
Amazon.com
148
$34.90
VEVOR Torx Bit Socket And External Torx Socket Set 60-Piece T6-T70 TT6-TT70 TP8-TP60 E4-E24 S2 Alloy Steel And Cr-V Steel 1/4 in 3/8 in And 1/2 in
VEVOR
28
$34.90
VEVOR Torx Bit Socket And External Torx Socket Set 60-Piece T6-T70 TT6-TT70 TP8-TP60 E4-E24 S2 Alloy Steel And Cr-V Steel 1/4 in 3/8 in And 1/2 in
VEVOR
28
$29.99
19Pc External Torx Plus Socket Set 6 Point EP4, EP5, EP6, EP7, EP8, EP10, EP11, EP12, EP14, EP16, EP18, EP20, EP22, EP24, EP26, EP28, EP30, EP32 With
Amazon.com
48
$29.99
19Pc External Torx Plus Socket Set 6 Point EP4, EP5, EP6, EP7, EP8, EP10, EP11, EP12, EP14, EP16, EP18, EP20, EP22, EP24, EP26, EP28, EP30, EP32 With
Amazon.com
48
$13.20
Proto Impact Socket: 3/8 in Drive Size, Torx, E10 Socket Size, External Torx, Std, Black Oxide Model: J7210TX
Grainger
$13.20
Proto Impact Socket: 3/8 in Drive Size, Torx, E10 Socket Size, External Torx, Std, Black Oxide Model: J7210TX
Grainger
$5.48
GEARWRENCH 80463 - External Torx Socket, 3/8' Drive, E16 Size | Tequipment
TEquipment
$5.48
GEARWRENCH 80463 - External Torx Socket, 3/8' Drive, E16 Size | Tequipment
TEquipment
$13.69
Proto Impact Socket: 3/8 in Drive Size, Torx, E6 Socket Size, External Torx, Std, Black Oxide Model: J7206TX
Grainger
$13.69
Proto Impact Socket: 3/8 in Drive Size, Torx, E6 Socket Size, External Torx, Std, Black Oxide Model: J7206TX
Grainger
$60.99
Lisle Socket Torx External Set 8 Pc., LIS26750
Advance Auto Parts
$60.99
Lisle Socket Torx External Set 8 Pc., LIS26750
Advance Auto Parts
$125.99
OTC External Torx Plus Socket Set 8 Pc, OTC5931
Advance Auto Parts
$125.99
OTC External Torx Plus Socket Set 8 Pc, OTC5931
Advance Auto Parts
$19.46
Proto Impact Socket: 1/2 in Drive Size, Torx, E18 Socket Size, External Torx, Std, Black Oxide Model: J7418TX
Grainger
31
$19.46
Proto Impact Socket: 1/2 in Drive Size, Torx, E18 Socket Size, External Torx, Std, Black Oxide Model: J7418TX
Grainger
31
$86.38
GEARWRENCH 80583 - External Torx Socket Set, 13 Piece, 1/4', 3/8' & 1/2' Drive, Black Oxide, Alloy Steel | Tequipment
TEquipment
1K+
$86.38
GEARWRENCH 80583 - External Torx Socket Set, 13 Piece, 1/4', 3/8' & 1/2' Drive, Black Oxide, Alloy Steel | Tequipment
TEquipment
1K+
$54.99
Craftsman E16 mm X 1/4 And 3/8 in. Drive Metric 6 Point External Torx Socket Set 7 Pc
Ace Hardware
$54.99
Craftsman E16 mm X 1/4 And 3/8 in. Drive Metric 6 Point External Torx Socket Set 7 Pc
Ace Hardware
$79.99
KD Tools Wr E14 X E18 External Torx 6Pt, KDT9222
Advance Auto Parts
$79.99
KD Tools Wr E14 X E18 External Torx 6Pt, KDT9222
Advance Auto Parts
$2.35
Westward Socket: 3/8 in Drive Size, E10 Socket Size, External Torx, Std, Chrome, Not Tether Capable Model: 20HX31
Grainger
$2.35
Westward Socket: 3/8 in Drive Size, E10 Socket Size, External Torx, Std, Chrome, Not Tether Capable Model: 20HX31
Grainger
$3.33
Westward Socket: 3/8 in Drive Size, E16 Socket Size, External Torx, Std, Chrome, 1 1/4 in Overall Lg Model: 54TN46
Grainger
$3.33
Westward Socket: 3/8 in Drive Size, E16 Socket Size, External Torx, Std, Chrome, 1 1/4 in Overall Lg Model: 54TN46
Grainger
$60.46
GEARWRENCH 80582 - External Torx Socket Set, 10 Piece, 1/4', 3/8' & 1/2' Drive, Black Oxide, Alloy Steel | Tequipment
TEquipment
$60.46
GEARWRENCH 80582 - External Torx Socket Set, 10 Piece, 1/4', 3/8' & 1/2' Drive, Black Oxide, Alloy Steel | Tequipment
TEquipment
$2.72
Westward Socket: 1/4 in Drive Size, E7 Socket Size, External Torx, Std, Chrome, 1 7/32 in Overall Lg Model: 54TN29
Grainger
$2.72
Westward Socket: 1/4 in Drive Size, E7 Socket Size, External Torx, Std, Chrome, 1 7/32 in Overall Lg Model: 54TN29
Grainger
$3.47
Westward Socket: 3/8 in Drive Size, E12 Socket Size, External Torx, Std, Chrome, 1 1/4 in Overall Lg Model: 54TN44
Grainger
$3.47
Westward Socket: 3/8 in Drive Size, E12 Socket Size, External Torx, Std, Chrome, 1 1/4 in Overall Lg Model: 54TN44
Grainger
$2.70
Westward Socket: 1/2 in Drive Size, E10 Socket Size, External Torx, Std, Chrome, Not Tether Capable Model: 20HX37
Grainger
$2.70
Westward Socket: 1/2 in Drive Size, E10 Socket Size, External Torx, Std, Chrome, Not Tether Capable Model: 20HX37
Grainger
$37.09
Lisle External Torx Plus Socket Set 1/2" Drive E6 - E18 - Ls83100
Penn Tool Co
$37.09
Lisle External Torx Plus Socket Set 1/2" Drive E6 - E18 - Ls83100
Penn Tool Co
$99.99
KD Tools 13Pc 1/4, 2/8 1/2Dr External Torx Socket Set, KDT80583
Advance Auto Parts
$99.99
KD Tools 13Pc 1/4, 2/8 1/2Dr External Torx Socket Set, KDT80583
Advance Auto Parts
$3.46
Westward Socket: 3/8 in Drive Size, E10 Socket Size, External Torx, Std, Chrome, 1 1/4 in Overall Lg Model: 54TN43
Grainger
$3.46
Westward Socket: 3/8 in Drive Size, E10 Socket Size, External Torx, Std, Chrome, 1 1/4 in Overall Lg Model: 54TN43
Grainger
$2.81
Westward Socket: 1/4 in Drive Size, E10 Socket Size, External Torx, Std, Chrome Model: 54TN31
Grainger
$2.81
Westward Socket: 1/4 in Drive Size, E10 Socket Size, External Torx, Std, Chrome Model: 54TN31
Grainger
$2.67
Westward Socket: 1/4 in Drive Size, E4 Socket Size, External Torx, Std, Chrome, 1 7/8 in Overall Lg Model: 54TN26
Grainger
$2.67
Westward Socket: 1/4 in Drive Size, E4 Socket Size, External Torx, Std, Chrome, 1 7/8 in Overall Lg Model: 54TN26
Grainger
$1.73
Westward Socket: 1/4 in Drive Size, E4 Socket Size, External Torx, Std, Chrome, Not Tether Capable Model: 20HX20
Grainger
$1.73
Westward Socket: 1/4 in Drive Size, E4 Socket Size, External Torx, Std, Chrome, Not Tether Capable Model: 20HX20
Grainger
$2.69
Westward Socket: 1/4 in Drive Size, E6 Socket Size, External Torx, Std, Chrome Model: 54TN28
Grainger
$2.69
Westward Socket: 1/4 in Drive Size, E6 Socket Size, External Torx, Std, Chrome Model: 54TN28
Grainger
0:07
Amazon.com: SEDY 14-Piece E-TORX Socket Set - Premium Fema
…
50 views
Jul 22, 2020
amazon
0:21
ABN Torx Bit Socket Set - 60 Pc Steel Star Bit Set Tamperproof, To
…
8 views
Jan 26, 2017
amazon
0:16
64-Piece External Torx Bit Socket Set, 1/4, 3/8, 1/2-inch Drive Master
…
Sep 5, 2022
amazon.com
This is the Most RELIABLE Luxury SUV I Could Buy for $4,000 (Not a
…
1.9M views
Apr 29, 2023
YouTube
Waldo's World
DIY fix Toyota Prius air Conditioning wont blow air, remove replace blo
…
1.8K views
Dec 17, 2023
YouTube
saneauto
1:51
Torx Screwdrivers
43.8K views
Mar 3, 2011
YouTube
Heather Taylor
9:18
Bolt Nut manufacturing process
1.1M views
Jan 2, 2018
YouTube
Nicole Lori
3:22
Seagate External Expansion Drive Teardown
180.8K views
Dec 15, 2018
YouTube
DoYouEvenTech
59:35
Toyota 3RZ Header Replacement
38.9K views
Jun 16, 2017
YouTube
Timmy The Toolman
12:39
Detailed Rotary Broach #TMC2020
260.7K views
Jul 2, 2020
YouTube
Tom Make Here
8:13
Titan External Torx Sockets Review
12.7K views
Jul 9, 2020
YouTube
Catus Maximus
9:51
Torx Screw M6x16 - SolidWorks Tutorial
7.4K views
May 24, 2021
YouTube
3D World
11:30
Wood Screw Sizes Explained - A Beginners Guide
154.4K views
Nov 22, 2020
YouTube
Training Hands Academy
10:29
HOW-TO Easily Remove Stripped Torx or Allen Bolt
70.7K views
Jun 4, 2020
YouTube
4Link4WD LLC
1:01
Gear Shaping and Spline Shaping
182.5K views
Apr 20, 2016
YouTube
Doppler Gear Company
2:13
Centering an External Broach
7.8K views
Apr 25, 2012
YouTube
Somma Tool
7:31
Harbor Freight Icon External Torx Sockets Review
11.1K views
Jun 6, 2020
YouTube
Catus Maximus
11:42
External Torx (E-Torx) Fasteners Introduction, Tips & Tricks
58K views
Jun 7, 2020
YouTube
Catus Maximus
2:44
TORX - T, TX, E and IP. What is the difference?!
59.1K views
Jun 29, 2020
YouTube
Transfer Multisort Elektronik
4:12
How to Use a Screw Extractor | The proper way.
1M views
Jun 21, 2020
YouTube
DIY Rabbit
3:17
LinA Live Tool Lathe Broach Video
80.2K views
Nov 29, 2012
YouTube
BenzIncorporated
25:58
Mini N14 Timing Chain Replacement
536.7K views
Jun 1, 2018
YouTube
EricTheCarGuy
7:17
Broaching on Lathes and Mills: Rotary Broaching | Slater Tools
244.5K views
Jun 5, 2014
YouTube
Slater Tools
3:32
Harbor Freight Professional 1/2" Drive Impact Star/Torx Socket Set
…
11K views
May 5, 2018
YouTube
Catus Maximus
4:54
Torx screws and what the numbered tips mean
20.7K views
Dec 14, 2020
YouTube
Trev Kongable
3:59
Catheter Video for applying a Male External Catheter Part 1
234.8K views
Apr 13, 2015
YouTube
BioRelief.com
7:36
How to Remove Torx (Star) bolts/screws | 4 WAYS | WELD NU
…
152.5K views
Sep 1, 2020
YouTube
How-to and Reviews
2:03
How to connect self starter alternator | self starter problem
383.7K views
Apr 19, 2021
YouTube
MrEngineers
6:12
đź‘€ WD My Passport. How to Open a Western Digital Elements Externa
…
206.5K views
Dec 21, 2019
YouTube
Vitalii Tereshchuk
4:58
Broaching on a Lathe or Machining Centre - Tel - 01204 523429 (UK)
665.5K views
Nov 3, 2010
YouTube
Machine Tool Supplies
See more videos
More like this
Shop external torx
Sponsored
$12.95
C23 547 E14 External Torx Socket
Freedom Racing Tool and Auto, LLC
$12.95
C23 547 E14 External Torx Socket
Freedom Racing Tool and Auto, LLC
$32.99
Yuesstloo Torx Plus Socket Set, External Torx Plus 6 Point EP Socket EP4 - EP32 19Pcs With 1/2'' 3/8'' 1/4'' Dr, Replacement For E-TORX Socket Set,
Amazon.com
99
$32.99
Yuesstloo Torx Plus Socket Set, External Torx Plus 6 Point EP Socket EP4 - EP32 19Pcs With 1/2'' 3/8'' 1/4'' Dr, Replacement For E-TORX Socket Set,
Amazon.com
99
$24.99
VEVOR Torx Bit Socket And External Torx Socket Set 31-Piece T8-T70 And E4-E24 S2 Alloy Steel And Cr-V Steel 1/4 in 3/8 in And 1/2 in Drives With
VEVOR
33
$24.99
VEVOR Torx Bit Socket And External Torx Socket Set 31-Piece T8-T70 And E4-E24 S2 Alloy Steel And Cr-V Steel 1/4 in 3/8 in And 1/2 in Drives With
VEVOR
33
$12.95
C23 548 E16 External Torx Socket
Freedom Racing Tool and Auto, LLC
$12.95
C23 548 E16 External Torx Socket
Freedom Racing Tool and Auto, LLC
$25.99
HAKUWI 19-Piece External Torx Plus Socket Set, Ultimate Star Socket Set, 6 Point EP Socket 1/2'' 3/8'' 1/4'' Dr EP4-EP32,5 Point EP Socket 1/2'' EP8.8
Amazon.com
8
$25.99
HAKUWI 19-Piece External Torx Plus Socket Set, Ultimate Star Socket Set, 6 Point EP Socket 1/2'' 3/8'' 1/4'' Dr EP4-EP32,5 Point EP Socket 1/2'' EP8.8
Amazon.com
8
$11.99
14-Piece Female E-Torx Star Socket Set With Magnetic Storage Rail, 1/4", 3/8", 1/2" Drive E4 - E24 External Impact Socket Set, Chrome Vanadium Steel,
Amazon.com
70
$11.99
14-Piece Female E-Torx Star Socket Set With Magnetic Storage Rail, 1/4", 3/8", 1/2" Drive E4 - E24 External Impact Socket Set, Chrome Vanadium Steel,
Amazon.com
70
$20.65
Proto Impact Socket: 1/2 in Drive Size, Torx, E20 Socket Size, External Torx, Std, Black Oxide Model: J7420TX
Grainger
$20.65
Proto Impact Socket: 1/2 in Drive Size, Torx, E20 Socket Size, External Torx, Std, Black Oxide Model: J7420TX
Grainger
$79.99
Grey Pneumatic 3/8Dr 9Pc External Torx Set, GRE1219ET
Advance Auto Parts
$79.99
Grey Pneumatic 3/8Dr 9Pc External Torx Set, GRE1219ET
Advance Auto Parts
$259.17
GEARWRENCH 84 Pc. 1/4", 3/8" & 1/2" Drive Hex/Ball End Hex/Tamper Proof Torx®/External Torx®/Torx® SAE & Metric Bit Set | Part 80742
MSC Direct
1K+
$259.17
GEARWRENCH 84 Pc. 1/4", 3/8" & 1/2" Drive Hex/Ball End Hex/Tamper Proof Torx®/External Torx®/Torx® SAE & Metric Bit Set | Part 80742
MSC Direct
1K+
$11.31
DT-48285 Valvebody E10 External Torx Plus Socket GM-48285
Freedom Racing Tool and Auto, LLC
$11.31
DT-48285 Valvebody E10 External Torx Plus Socket GM-48285
Freedom Racing Tool and Auto, LLC
$43.20
Seco Driver For Indexables: T9 Torx & Torx Plus Drive - For Drivers | Part 16697
MSC Direct
$43.20
Seco Driver For Indexables: T9 Torx & Torx Plus Drive - For Drivers | Part 16697
MSC Direct
$14.99
Yuesstloo E-Torx Socket Set, 14 Piece Female E-Torx Star Socket Set, 1/4" 3/8" 1/2" Drive, E4 To E24 External Torque E Socket Set, 14Pcs Star Socket
Amazon.com
148
$14.99
Yuesstloo E-Torx Socket Set, 14 Piece Female E-Torx Star Socket Set, 1/4" 3/8" 1/2" Drive, E4 To E24 External Torque E Socket Set, 14Pcs Star Socket
Amazon.com
148
$34.90
VEVOR Torx Bit Socket And External Torx Socket Set 60-Piece T6-T70 TT6-TT70 TP8-TP60 E4-E24 S2 Alloy Steel And Cr-V Steel 1/4 in 3/8 in And 1/2 in
VEVOR
28
$34.90
VEVOR Torx Bit Socket And External Torx Socket Set 60-Piece T6-T70 TT6-TT70 TP8-TP60 E4-E24 S2 Alloy Steel And Cr-V Steel 1/4 in 3/8 in And 1/2 in
VEVOR
28
$29.99
19Pc External Torx Plus Socket Set 6 Point EP4, EP5, EP6, EP7, EP8, EP10, EP11, EP12, EP14, EP16, EP18, EP20, EP22, EP24, EP26, EP28, EP30, EP32 With
Amazon.com
48
$29.99
19Pc External Torx Plus Socket Set 6 Point EP4, EP5, EP6, EP7, EP8, EP10, EP11, EP12, EP14, EP16, EP18, EP20, EP22, EP24, EP26, EP28, EP30, EP32 With
Amazon.com
48
$13.20
Proto Impact Socket: 3/8 in Drive Size, Torx, E10 Socket Size, External Torx, Std, Black Oxide Model: J7210TX
Grainger
$13.20
Proto Impact Socket: 3/8 in Drive Size, Torx, E10 Socket Size, External Torx, Std, Black Oxide Model: J7210TX
Grainger
$5.48
GEARWRENCH 80463 - External Torx Socket, 3/8' Drive, E16 Size | Tequipment
TEquipment
$5.48
GEARWRENCH 80463 - External Torx Socket, 3/8' Drive, E16 Size | Tequipment
TEquipment
$13.69
Proto Impact Socket: 3/8 in Drive Size, Torx, E6 Socket Size, External Torx, Std, Black Oxide Model: J7206TX
Grainger
$13.69
Proto Impact Socket: 3/8 in Drive Size, Torx, E6 Socket Size, External Torx, Std, Black Oxide Model: J7206TX
Grainger
$60.99
Lisle Socket Torx External Set 8 Pc., LIS26750
Advance Auto Parts
$60.99
Lisle Socket Torx External Set 8 Pc., LIS26750
Advance Auto Parts
Feedback