2-1/2" Industrial Grade Padlock, Triple Plated Solid, Round Steel, High Security Padlock, High Tech Boron Hardened Shackle, Dual Ball Bearing Locking Mechanism, High Security Spool Pins, Rekeyable, 1-1/8" Shackle, 7/16" Shackle Diameter, Uses Master Lock Key Blank K900BOX Or Ilco Blank TV #633-800, Carded.