Marks USA manufactures a versatile series of Grade 1 Deadlatches and Deadbolts which install easily and accept most other manufactures conventional, high security and IC Core cylinders.
Features
Tapered cylinder collars prevent (break in attempts by) wrenching
Steel shutter system eliminates access to mounting screws when door is locked.
ANSI 156.5
Unitized assemblies for 2-1/8" bore
Strike: #1335, 2-3/4" × 1-1/8" strike
IC Core Tailpieces ARE Included
Interchangeable Core models for 6 or 7 pin cores (not included)