The Master Lock Commercial Magnum No. M5LJ Laminated Steel Padlock with Stainless Steel Body Cover features a 2in (51mm) wide laminated steel body encased in a stainless steel body cover for maximum strength and weatherability. The 3/8in (10mm) diameter octagonal shackle is 2-1/2in (64mm) long and 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 Magnum offers a higher level of weatherability and security for applications in outdoor, corrosive and caustic environments. • Magnum choice of professionals • Tough-Cut; octagonal boron-carbide shackle is 50% harder than hardened steel • 2.5-in (64mm) shackle clearance for more uses • Dual-armor protection: 2-in (51 mm) laminated steel core for strength surrounded by stainless steel and zinc outer components for weather resistance • Dual ball bearing locking for maximum pry resistance • Reinforced body bumper for scratch resistance • 4-pin cylinder for increased pick resistance • Chisel-resistant recessed rivets • Same key opens all 4 locks UPC: 071649144783 Weight: 1.5 lbs RKU: LOW363537