Barrel Bolts are designed to be surface mounted bolt. They are easy to install and are used for many applications such as Toilets, Cloakrooms, Gates, Sheds, Store Rooms. Cupboards or even as Additional Security to existing doors. For indoor and outdoor use Includes Fixing Screws Specifications: Size:2" & 3" 2" Hole Centers: 13 x 36mm 3" Hole Centers: 13 x 57mm Material: Brass Coated Aluminium Width: 25mm 2" Total Length (Inc. Keep): 64mm 3" Total Length (Inc. Keep): 88mm Keep Size: 12 x 25mm Keep Hole Centres: 13mm Barrel Size: 8mm