The Master Lock 1500iD Speed Dial Directional Set Your Own Combination Padlock features a 2-1/8in (54mm) wide metal body for durability. The 1/4in (6mm) diameter shackle is 1in (25mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The patented up/down/left/right directional movement technology is faster, easier and more secure than a standard combination lock. The locking mechanism features anti-shim technology, offering maximum security. The Limited Lifetime Warranty provides peace of mind from a brand you know and can trust.