8101 - Yale 8100 Series Standard Duty Deadbolt (One side Deadbolt) 8100 deadbolt series is an economical durable deadbolt, ideal for use as an auxiliary lock on residential applications. Standard: ANSI / BHMA A156.5.2001 Testing Cycles: Tested up to 100,000 cycles Materials: - Chassis: Steel - Latch and Bolt: Zinc - Cylinder Housing: Steel - Round Plate: Brass Backset: 60mm / 70mm Door Thickness: 35~50mm Function: Residential applications. Anti-Sawing Insert: Hardened Steel Cylinder: Solid Brass 5-pin tumbler cylinder No. of Keys: 3pcs of nickel plated brass key Finishes: Polished Brass (US3), Antique Brass (US5), Antique Copper (US11), Satin Stainless Steel (US32D) 8111 - Yale 8100 Series Standard Duty Deadbolt (Single Cylinder with Thumb turn) 8121 - Yale 8100 Series Standard Duty Deadbolt (Double Cylinder Deadbolt)