General description The Master Lock 1178D ProSeries® 4-Digit Padlock features a robust die-cast zinc body and an octagonal boron carbide alloy shackle, providing superior protection against forced removal. Its resettable 4-digit combination offers over 10,000 possible combinations, while the deadlocking mechanism safeguards against prying, shimming, and rap attacks. The combination dials are designed for ease of use, even in low light or when wearing gloves, and the lock is equipped with a shackle seal and combination dial dust cover to maintain internal integrity and protect against dirt and debris. Technical specifications Body dimensions: 57 x 50 mm Body thickness: 31 mm Shackle dimensions: 24 x 27 mm Shackle thickness: 10 mm