This is the High Security Stainless Steel Padlock from Diversi-Tech, part number DT40122. The padlock features a 3/8 inch diameter shackle and, when opened, the shackle leaves a 7/8 inch opening. The outside of the lock is stainless steel and the inner parts of the lock and the shackle are created from chrome plated hardened steel. The inside mechanism is made of brass. To use the lock, a simple… see more >