The Master Lock Excellâ '' ¢ Discus Combination Padlocks are with cutting edge technology to deliver new security. They sinewy cut proprietary polygon boron carbide shackles which are 50 % tougher to cut than burned steel. They best weather resistance with the extra security of a shrouded shackle, which is large indefinite quantity tougher to pull/pry blatant. This padlock a set-your-own 4-digit combination for keyless convenience. with a Lifetime Warranty against mechanised failure. Suggested : gates, sheds, storage units, fences, containers and chains. Specification Shackle : 10 mm.Internal Shackle Dimensions : 24 x 19 mm.Possible Combinations : 10,000. '' ¢ Discus 4-Digit Combination 70 mm Padlock .