Master lock 646DAU set your own combination padlock has a durable a 20mm wide metal body. Enhanced with a cut-resistant steel shackle, which is 3mm diameter is 17mm long, this combination paddle offers superior protection. Working on a 3 dial combination security, this amazing paddles enhances convenience and ease of use. Easy to set and reset numeric combination. 20mm Wide durable solid metal body with black finish. Steel shackle for cut resistance. 3 dial combination security for keyless convenience.