The From the Anvil Locking Screw on Staple Penny End Black is to be used in conjunction with a thumblatch, generally on bathroom or toilet doors. The overall size is 108mm x 20mm and is sold individually, complete with leather thong & pin (to stop movement of the latch bar) and fixings. Black Staple The staple 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. Other Variation...