Non-handed Interchangeable core and primus xp high security cylinders. Master keying, grand master keying, and construction keying. Keyed functions are reversible. Non-keyed functions are not handed. Patented door range adjuster allows quick and easy adjustment for doors ranging from 1 3/8" to 1 7/8" (35 mm to 48 mm) thick Interchangeable core and primus xp high security cylinders. Master keying, grand master keying, and construction keying.