Door Thickness 35mm - 65 mm Spindle Type 8mm spring loaded spindle Body Material Zinc Alloy Non Handed Lock will fit doors hung on the left or right Mortice Latch (4010) Medium duty, stainless steel latch bolt head with “anti-shim” plunger, 8mm follower. 60mm backset, requires 25mm hole, 82mm deep. Option as above with 70mm backset requiring 92mm hole. Batteries 4xAA Cells @2,900mAh. Calculated to provide over 500,000 operations. Code Free mode can be set electronically at the keypad or mechanically by means of the override key. CL4000 locks can be supplied Keyed Alike on request. For internal and external use.