Tru-guard, 3 pack, 1-1/2", 38 mm wide, laminated padlock with 1-1/2" long shackle for resistance to cutting & sawing, same key opens all locks in package, 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.