The body is manufactured from solid brass and is sealed with a shock absorbing material designed to protect the cylinder against water and dirt it features a precision steel tumbler cylinder with a stainless steel shackle where to use it medium security requirement in severe weather and environmental conditions ideal for securing to vehicles and boats overall width 53 mm overall height 73 mm overall depth 28 mm shackle width 205 mm idshckle height 245 mm shackle dia 8 mm