










🚪 Fix sagging doors like a pro—fast, precise, and effortless!
The FastCap Knuckle Bender is a steel, adjustable door hinge tool featuring a built-in hinge pin remover. Designed by a carpenter for quick, accurate fixes of sagging doors, it fits any hinge size and speeds up repairs while protecting hinge finishes. Lightweight and easy to use, it’s a must-have for contractors and DIYers aiming for professional results.





















| ASIN | B0082DDNHO |
| Batteries Included? | No |
| Batteries Required? | No |
| Color | Multicoloured |
| Customer Reviews | 4.4 4.4 out of 5 stars (3,778) |
| Date First Available | May 11, 2012 |
| Included Components | Knuckle Bender |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 3.52 ounces |
| Item model number | KNUCKLEBENDER |
| Manufacturer | Fastcap |
| Material | Steel |
| Package Dimensions | 10.43 x 2.83 x 0.75 inches |
| Part Number | KNUCKLE BENDER |
| Power Source | Crank |
J**A
Definitely works
Works really good
D**G
Best tool for the job
Excellent product! Fully adjustable dont need a different tool for every different size. Fixed a sticking closet door in about 30 seconds.
R**S
Good tool but not great
This is a worthwhile tool but it could be a bit longer to increase the leverage. If you fix a lot of doors buy it.
Y**R
Hinge adjuster
Good tool for purpose
C**D
Works great
Worked as advertised. Had doors that I tried to adjust the James and still didnt work. This tool fixed those hard to close and poorly aligned doors in minutes.
E**E
Take your time. Get the process down pat before you start.
This is a very convenient and easy to use tool - and it does the job! However, if you have thick door casings as I do, you’ll likely have to temporarily remove the casing to get the tool jaw around the hinge. Also, be sure to first check tightness of your hinge screws before removing hinge pin and shimming door to the proper fit. I was positive my screws were tight - but they weren’t. And…. bend only the hinge knuckles that attach to the door - NOT those on the jamb side of the hinge.
B**N
Works OK, but door trim can get in the way
The tool generally works well and has good build quality. The main problem I have is that all my doors have trim/casing around them it there isn't enough clearance between the hinge and the trim to get a good grip with the pliers. Metal pliers on metal hinge also leaves scratch marks. In spite of the clearance issues, I was able to use the tool on two doors with moderate success.
B**B
Exactly what I needed
Fantastic! The fit is perfect for getting into tight spaces. And it worked great
E**R
Great product , does the job
M**E
Good unit, only good for larger hinges. Not enough clearance on non mortice hinges kn Australia
D**R
Good product and fast delivery
N**H
Works reallt well. We bought one for each trailer. Can do the adjustments when he hinge still attached to rhe door. Unless the trim is too close.
S**.
I should have took notice of the other review that it don’t work! .. £30 down the drain . It don’t grip on to the hinge and when I try and pull it back the door frame is in the way .
Trustpilot
5 days ago
1 week ago