GKL Products

Innovative Products for the Lock, Security & Maintenance Industries. GKL Products has been developing both residential and commercial products for the lock and security industry since 1972. Our flagship product, the Hinge Doctor®, has been an effective and unique tool in the restoration of door hinges.

GKL Products Catalog

We manufacture our products from the best materials available and with the highest quality craftsmanship. A purchase of a quality GKL Product is a choice for durability and value, which will pay off over time, every time.

HINGE DOCTOR® PRODUCTS

Repair sagging doors in 15 seconds

Hinge Doctor Products
HINGE DOCTOR® Products

HINGE SCREW PRODUCTS

Special hinge screws for stripped out frames

Hinge Screw Products
HINGE SCREW Products

STOREFRONT DOOR PRODUCTS

Repair or modify storefront doors with a twist

Storefront Door Products
STOREFRONT DOOR Products

MORE INNOVATIVE PRODUCTS

Designed to save you time and money

More Innovative Products
MORE INNOVATIVE Products

★★★★★ Product Reviews

Snap in Bridge | GKL Products The Bridge®

"If you’re in the aluminum stile door repair business you need this product!"

– Jake Jakubuwski
The National Locksmith magazine

HA2 The Hulk | GKL Products The Hulk

“I used to remove the hinges from the door and put them in a vise to bend them back to their original condition. Now I use the Hinge Doctor and what used to take up to an hour takes only a few seconds. Thanks for a great tool.”

– Eric Olsen

Mega Screwdriver | GKL Products Mega Screwdriver

"I am an institutional lock smith and purchased a mega screw driver a few years ago and quickly realized the benefits. It has made my job much easier. I honestly don’t know how I would get a long without it."

– Paul Dudley

Installation Videos

Hinge Doctor®