The Master Lock Excell™ Laminated Stainless Steel Padlock has a laminated steel body encased in a stainless steel body cover for maximum strength and weatherability. Its octagonal shackle is made of chrome-plated boron carbide, 50% harder than hardened steel, offering maximum resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking ball bearings provide maximum resistance against prying and hammering. Commercial Excell™ offers a higher level of weatherability and security for applications in outdoor, corrosive and caustic environments.