The Tell CL100056 Double Cylinder Deadbolt is a standard duty commercial lock made of satin stainless steel (US32D), compliant with ANSI A156.5, grade 2 (150,000 cycles). It features a 6-pin SCC keyway with two nickel keys per lock. Suitable for doors ranging from 1-3/8 inches to 1-3/4 inches thick, it includes an adjustable backset and tubular construction for enhanced durability.