PATENTED Stainless Steel High Security Disc (Disk) Padlock 2-3/4" PATENTED - Key removable with lock in open position. 3 keys RUST FREE. Stainless steel body. 3 drain holes for all weather use HIGH SECURITY. Anti-Pick: 5-PIN (not 4 pin). Solid Brass tumbler Shackle 9 1/2 mm. High quality chrome plated hardened steel. Over 20 years of manufacturing excellence. 10,000 locks per day.