The From the Anvil 6\" Cranked Knob Door Bolt Black are tight fitting, well made and include a unique spring mechanism - they are for use on outward opening doors. The fixing plate measures at 158mm x 51mm and the receiver bridge is 51mm x 25mm. It is sold individually complete with fixing screws. Black Door Bolt The bolt has a black finish - this is baked in a high-temperature oven to give it good durability and can be used internally or externally. To remove dirt deposits, simply wipe over with a lightly oiled cloth from time-to-time and this will restore it to its original condition. Othe...