Master Stainless Steel Lock - #40 Case-Hardened 3/8" steel shackle for extra cut resistance. 4-pin cylinder helps prevent picking. -3/4" (70mm) wide stainless steel body resists corrosion Fully shielded design minimizes shackle exposure. Double deadbolt locking to guard against pulling. Key retaining feature ensures padlock is not left unlocked. Ideal protection against bolt cutter attacks