The From the Anvil Thumblatch Set with Chain Black can be used on doors up to a maximum thickness of 44mm. The overall height is 200mm, the handle length is 110mm and the latch length is 150mm. It is sold as a set and comes complete with a chain (on the inside for privacy) and fixing screws. Black Thumblatch The latch 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.