Rim Locks ART No.3856 Supplied With Striker Plate & Amp; 2 Keys (20 Mm Cylinder Suitable For Door Thickness Of 15 Mm) (25 Mm Cylinder Suitable For Door Thickness Of 20 Mm) Face Plate 65L X 55W Mm Height is 98 mm Thickness of the lock is 15 mm Backset is 37 mm (from the edge to the centre of the turn) Depth 58 mm It comes in 20 & 25 mm cylind..