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- GKL Products
- GKL Products
GKL Products
GKL Products - Innovative Products for the Lock, Security, and Maintenance Industries. GKL Products has been developing both residential and commercial products for the lock and security industry since 1972 and are manufactured from the best materials available and with the highest quality craftsmanship. Their flagship product, the Hinge Doctor®, has been an effective and unique tool in the restoration of door hinges. GKL Products A purchase of a quality GKL Product is a choice for durability and value, which will pay off over time, every time.