Product Description Application Professional High Security padlock for general use. Operation Rotate key 55?- 65? to unlock. Options Removable shackle with non-retaining key Pop-open shackle with retaining key (key needed for closing) Variety of shackle clearances Added Mul?T?Lock hasp Added shackle protector Materials Shell: hardened steel Core: black plated solid brass Shackle: hardened boron alloy steel Additional features Protective shutter prevents dust contamination Drainage holes prevent freezing Finishes Black electrophoretic; Chrome nickel bright Cylinder mechanism Mul-T-Lock's unique, high-precision pin tumbler system. Pick and drill resistant for High Security needs. Keys Reversible nickel silver key with plastic key head and colored insert. Also available in all nickel silver. Cylinder platform : Interactive