1-3/4", Solid Brass Padlock, 2" Long Shackle, 5/16" Shackle Diameter, Keyed Different, Solid Brass Body Is Strong, Durable & Resists Corrosion, Dual Ball Locking For Added Protection From Prying & Hammering, Hardened Steel Shackle For Added Protection From Cutting & Sawing, 5 Pin Cylinder For Maximum Pick Resistance, Uses Master Lock Key Blank K81KRBOX Or Ilco Blank M4, 1092V, TV #633-800, Carded.