The Master Lock no. 6121KA Pro Series Weather Tough Covered Laminated Padlock, Keyed Alike – multiple locks open with the same key – features a 2-1/8in (54mm) wide heavy steel body to withstand physical attack and a 1-1/8in (29mm) tall, 5/16in (8mm) diameter hardened boron alloy shackle for superior cut resistance. The exclusive cover protects this padlock from harsh elements and a high security, rekeyable 5-pin cylinder with spool pins is virtually impossible to pick. • Keyed alike - order multiple locks to open with the same key or order to match other locks with the W6000 cylinder • Ideal for harsh outdoor conditions - exclusive Pro Series Weather Tough cover protects lock from water, ice, dirt and grime • Pro Series padlocks are designed for commercial/industrial applications • 2-1/8in (54mm) heavy steel body withstands physical attack UPC: 071649357169 Weight: 0.5 lbs RKU: LOW3756413