This Master Lock 1-1/8 in. wide padlock is made out of laminated steel for extra strength. The 3/16 in. diameter, 9/16 in. long shackle is manufactured from steel for extra resistance to cutting, sawing and prying. Also, the minimum shackle clearance helps prevent prying. Another added security feature is a 4 pin cylinder that helps prevent picking. This padlock has more than 1,500 key changes for maximum pick resistance. This lock is perfect for backpacks, duffle bags and sports bags, brief cases, tackle boxes and cabinets.