Deadbolt Latch | Thumbturn Lock 80mm| By Buster + PunchA tubular deadbolt latch with 60 mm, 70 mm or 80 mm backset, designed to work in conjunction with our thumbturn locks. Faceplate and strike plate made from machined solid metal. Finished by hand. A custom weighted, dual directional throw ensures a smooth, consistent feel every time you unlock the door. Works great on all internal doors.