The 4500C series electric strike is designed for installation in 2″ UL 10C fire-rated frames with 1/2″ drywall penetration. The 4500C features a low profile 1-3/8″ depth, heavy-duty stainless steel construction. Its strength is derived from a unique keeper pin locking design, enabling the 4500C to exceed the ratings of the frame, door and locking hardware.