Master Lock 1500iD Speed Dial Combination Lock, Assorted Colors, 4-Pack Worlds first combination lock that opens on up/down/left/right directional movements Patented technology is faster, easier and more secure than a standard combination lock Maximum security with anti-shim technology Matching passcode indicators (letters, numbers, colors, shapes, symbols) are included for added customization  simply apply over arrows Hardened steel shackle for increased bolt cutter protection