Rollerbolt operated by push or pull from either side. Deadbolt operated by key from either side. Rollerbolt is brass and adjustable to suit either hand. Deadbolt is also brass with two hardened steel rollers and the throw is 16mm. The measurements are as follows: 63mm lock come with 45mm backset, 76mm(A) lock comes with 57mm(B) backset, 101mm(A) lock comes with 82mm(B) backset. 200 standard differs numbered 001-200. If you are choosing the master keyed lock then these are available in master, sub and grand master keyed