GKL Products
Technology, Innovation & Convenience
In The Lock & Security Industry
About
Originally established in Fremont California in 1972 by Steve Goldstein, and currently located in larger facilities in Herald, California, GKL Products has been developing both residential and commercial products for the lock and security industry. Our 
"flagship" product, the Hinge Doctor, has been an effective and unique tool in the restoration of door hinges and has lead the way to new product development and release.
Now in our 34th year of operation, our product development continues to flourish. A number of new products are in the final stages of development and release and will herald the ongoing drive to bring new products to the industry.
"flagship" product, the Hinge Doctor, has been an effective and unique tool in the restoration of door hinges and has lead the way to new product development and release.Now in our 34th year of operation, our product development continues to flourish. A number of new products are in the final stages of development and release and will herald the ongoing drive to bring new products to the industry.
Our customers from West Virginia University tell the story best.
"We recently bought a set of four of your Hinge Doctors for our Locksmith Shop at West Virginia University. Normally in the course of a year we have to shim hinges, shave doors and doorways to make them fit. Since we received your Hinge Doctors we have fixed several doors that, frankly, we figured we would have to remount or plane wood or metal from to get them to fit properly. Today we had a door that was rubbing on the floor at the bottom hinge end of the door and rubbing on the top edge farthest from the top hinge. We carefully used the Hinge Doctor on the top hinge first and slightly on the other two hinges making the door easily close with the door closer mechanism. Your invention is the neatest thing since sliced bread for us. We have a full set in three of our Carpenter/Locksmith trucks now. The Hinge Doctor is a great tool. We would have had to spend hours and a crew of several men to achieve what we did with the Hinge Doctor in about 5 minutes."
Karl Hildebrand
WVU Lock Shop
Morgantown, WV
"We recently bought a set of four of your Hinge Doctors for our Locksmith Shop at West Virginia University. Normally in the course of a year we have to shim hinges, shave doors and doorways to make them fit. Since we received your Hinge Doctors we have fixed several doors that, frankly, we figured we would have to remount or plane wood or metal from to get them to fit properly. Today we had a door that was rubbing on the floor at the bottom hinge end of the door and rubbing on the top edge farthest from the top hinge. We carefully used the Hinge Doctor on the top hinge first and slightly on the other two hinges making the door easily close with the door closer mechanism. Your invention is the neatest thing since sliced bread for us. We have a full set in three of our Carpenter/Locksmith trucks now. The Hinge Doctor is a great tool. We would have had to spend hours and a crew of several men to achieve what we did with the Hinge Doctor in about 5 minutes."
Karl Hildebrand
WVU Lock Shop
Morgantown, WV
