Combination or key steel padlock. Set your own combination. Open with a key or combination. Tough cut octagonal boron-carbide shackle is 50 percent harder than hardened steel. Has a 2 inch (51mm) shackle clearance and 2 inch (51mm) wide zinc diecast body with reinforced body bumper for scratch resistance. Covered dials for superior weather protection. Uses master lock key blank k7box or ilco blank m7, sku #u182469. Toughcut octagonal boroncarbide shackle. Setyourown combination convenience. Covered dials for weather protection. Reinforced body bumper for scratch resistance. Key accessible. Includes backup key. 4pin cylinder. 2 inch wide case, 3/8 inch shackle diameter, and 30/32 inch horizontal shackle clearance.