Laminated Steel Padlock. Hardened steel bottom plates for extra drill resistance. Top & bottom bumpers for greater scratch resistance. 1-3/4" (44mm) wide lock body, 5/16" (8mm) diameter hardened steel shackle, 15/16" (24mm) high, 3/4" (19mm) wide shackle clearance. Non-rekeyable, 4-pin, W-1 cylinder