Indoor combination lock is best used as a school locker lock or gym lock, providing protection and security from theft.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit. Set your own five character (letter, number, or symbol) combination for keyless convenience Combo lock features metal body construction, hardened steel shackle, and anti-shim locking mechanism for strength and security 2-1/2 inch (64 millimeter) wide lock body; 1/4 inch (6 millimeter) diameter with 1-1/8 inch (29 millimeter) length, 1-3/8 inch (35 millimeter) width; Available in black, blue, green, white (randomly selected at time of shipment) Soft touch dials with two grip points for no-slip grip; Interchangeable dials allow you to set and reset your personalized combination