The Master Lock No. 1533TRI Standard Dial Combination Padlock features a 1-9/16in (40mm) wide metal body for durability, with an anodized aluminum finish. The 3/16in (5mm) diameter shackle is 11/16in (17mm) long and made of steel, offering resistance to cutting and sawing. The 3-digit combination offers keyless convenience. The bright metallic color simplifies locker identification. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.