1-1/2", Laminated Padlock With Stainless Steel Shackle For Superior Cut & Weather Resistance, Laminated Steel Body With Protective Weather Coating, Random Keyed Alike In Sixes, Shackle Length 3/4", Shackle Diameter 9/32", Uses Master Lock Key Blank K1 Box Or Ilco Blank M1 TV #320-952.