Rollerbolt operated by push or pull from either side. Deadbolt operated by key from either side using a double cylinder (not supplied) or by key outside and thumb turn inside using a cylinder thumb with turn(not supplied). Rollerbolt is brass and adjustable to suit either hand. Deadbolt is also brass with two hardened steel rollers and the throw is 14mm. The measurements are as follows: 63mm(A) lock come with 45mm(B) backset, 76mm(A) lock comes with 57mm(B) backset, 101mm(A) lock comes with 82mm(B) backset