26d hd comm 1cy deadbolt. (DB2051). Standard duty commercial single cylinder deadbolt. Satin stainless steel (US32D). performance: Complies with ANSI A156.5, Grade 2 (150,000 cycles). Keying: 6 pin SCC keyway with 2 nickel keys per lock. Door range: 1-3/8" to 1-3/4". Backset: Adjustable standard. Tubular construction. Deadbolt operated by key from outside or thumb turn inside. Finish: Stainless Steel, Cylinder Type: Single, Keyway: SCC, Backset Size: Adjustable, Exterior Access: Key, Interior Action: Thumb Turn