The Grainger 16Z180 is a heavy duty, high security padlock made by Master Lock. It features a solid steel shackle and body with a 1-9/16 inch shackle clearance. The padlock has a 5 pin tumbler cylinder keyway and comes with 2 keys. It can withstand over 39,000 pounds of cut force and has a temperature tolerance from -40 F to 210 F. This padlock is ideal for securing chain link fences, warehouses, storage sheds, truck trailers, cargo containers, and other high security applications.