2-1/2", Heavy Case Hardened Steel Body Padlock, 1-1/8" Long Shackle, Keyed Alike To Key #10G019, Same Key Opens All Padlocks, Rekeyable, Hardened Boron Alloy Shackle For Superior Cut Resistance, 5 Pin Tumbler Pro Series Provides Tens Of Thousands Of Key Changes, Special Spool Pin Tumblers Are Virtually Impossible To Pick, Chrome Rust Proofing Provides Longer Life, Uses Master Lock Key Blank K6000box Or Ilco Blank TV #696-328, Box Pack.