A magnetic gas-powered Grapple Gun was designed by Lucius Fox at Wayne Enterprises. This was one of the first pieces of equipment acquired by Bruce Wayne when he began building his new identity as Batman. The grapple gun is tested for a maximum of 350 pounds and fires a retractible, detachable and replaceable line used for climbing or descending several stories in seconds and swinging across gaps and from large structures, as well as to incapacitate targets. The device is holstered on the back of the utility belt on his Nomex survival suit.