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.
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.
