Trimax THP3XL Universal "Hockey Puck" Internal Shackle Door Lock is re-keyable and protects against bolt cutters. There is no exposed shackle to cut or saw. The enlarged opening covers and secures all trailer hasps! Ideal for gates, trucks and heavy duty security hasps. It is easy to use and weather resistant. Features solid steel construction and a thicker body with a 3/8" diameter internal shackle. Available in single packs or keyed-alike two and three packs.