The Grainger 16U489 is a heavy duty, high security, commercial grade 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 is available in a brushed chrome finish and offers excellent corrosion resistance. With a hardened steel shackle and body, this padlock provides very high security and durability. It is ideal for securing gates, storage units, equipment, and more in commercial and industrial settings.