The Master Lock 5SST Stainless Steel Padlock with Key features a 2 in. (51mm) wide laminated stainless steel body for maximum strength, reliability, and weather resistance. The 3/8 in. (10mm) diameter shackle is 1 in. (25mm) long and made of stainless steel, offering maximum resistance to cutting, sawing and weather. The 4-pin cylinder prevents picking and the dual ball bearing locking mechanism provides maximum pick and pry resistance. The Lifetime Guarantee provides peace of mind from a brand you know and can trust. Features: Padlock with key is best used for marine recreation, saltwater applications, offshore security environments and severe uses Key lock features a stainless-steel lock body and shackle for maximum strength and corrosion resistance Brass 4-pin tumbler and dual ball bearing locking mechanism provide maximum weather, pick and pry resistance 2-in. (50 mm) wide lock body; 3/8-in. (10 mm) diameter shackle with 2-1/2 in. (64 mm) length, 15/16-in. (24 mm) width; Extended shackle for application flexibility Includes two padlocks with two keys; Both keys open each lock