The Master Lock Steel 2in (51 mm) Padlock with Key 1in (25 mm) Shackle is the tough reliable lock with key that can withstand the outdoor elements and constant use making them an excellent choice for toolboxes job sites outdoor locks for gates storage units and more. This heavy duty padlock offers security you can feel in your hand letting you lock up access points and secure property. The hardened steel shackle also protects against attacks like cutting and sawing. The 4-pin cylinder prevents picking and the dual locking ball bearings provide resistance against prying and hammering. The Limited Lifetime Warranty provides peace of mind from a brand you know and can trust.