• Stainless steel body cover and top and bottom plates for exceptional weatherability • 1-3/4" wide laminated steel body for superior durability • 1-1/2" Shackle Clearance • 1" octagonal boron carbide shackle is 50% harder than hardened steel • Chrome-plated shackle for excellent rust resistance • Superior pry resistance with dual-ball bearing locking • K1 keyway