Master Lock 105D Laminated Padlock. This lock has a 1-1/8”(29mm) wide laminated steel body for strength and reliability. The 3/16” (5mm) diameter shackle is 1/2” (13mm) long and made of steel. Protective coating helps prevent scratching. Black plastic bottom has the Master logo on it. Classic padlock for a collar but shackle will be too big for most locking buckles. Comes with two nickel-plated keys. Weighs 3oz.