1-3/4-Inch Solid Brass Padlock, 2-Inch Long Shackle, 5/16-Inch 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 Keyblank M4, 1092V, True Value #633-800, Carded.