Tru-Guard, 1-1/2", 38 mm Wide, Laminated Padlock With 1-1/2" Long Shackle For Resistance To Cutting & Sawing, Shackle Dimensions 1/4" Shackle Diameter, 1-1/2" Height, 3/4" Width, Uses Master Lock Key Blank K1 Box Or Ilco Blank M1 TV #320-952, Carded.