Use this lock indoors or outdoors, such as for a gym locker, to ensure security and protection against theft. Make sure to measure your door's backset, cross bore, and thickness to find the correct fit. This key lock has a black vinyl-covered aluminum body for scratch and corrosion resistance, and a hardened steel shackle for cut resistance. It also includes a four-pin cylinder and dual locking lever mechanism for pick and pry resistance. The lock body is 1-9/16 inches (40 millimeters) wide, and the shackle is 1/4 inch (6 millimeters) in diameter with a length of 7/8 inch (22 millimeters) and a width of 13/16 inch (21 millimeters). Each package contains one padlock and two keys, with matching color key heads for added convenience.