HES 8500 Complete Electric Strike Fail Safe Fail Secure 12 24VDC Up To 5 8" Throw Latchbolt Satin Stainless Steel Grade 1 Electronic Locks Door thickness 1 3 4" (44mm) standard Door thickness 1 3 4" (44mm) standard Backset 2 3 4" (70mm) Strike # 480 Strike Standard: 3 1 2" (89mm) x 1 1 8" (29mm) Bolt Laminated Stacked Steel Deadbolt with Hardened Pin and a 1" throw Cylinder Brass Alarm Lock Tailpiece is supplied This field selectable fail secure fail safe unit is easy to install and accommodates latchbolts up to 5 8" throw 000 Dynamic Strength (ft lbs): 70 Tamper Resistant: Yes Grade: Grade 1 Warranty: 5 Year Certifications: UL 1034