Designed for sliding and hinged gates, these steel units are ready for welding. - Double cylinder hook lock, keys from both sides. 2 keys in each pack. KEYED ALIKE available for up to 6 locks. - Hook Bolt made of 5 ply laminated steel bolt with concealed hardened steel pin to provide the highest level of security. - Steel case with corrosion resistant plating. All parts are zinc plated for protection against corrosion. Aluminum faceplate where key is inserted. - Overall Measurement: 7" Length x 2" Wide x 1-3/4" Depth. Backset 1-1/8".