ASSA AA-SR400 (Like American Lock A2000) 2-7/8" Shackleless Solid Steel Step Back Padlock Lock Resettable Combination Dial Hockey Puck Style (Combonation In Front), Shackleless Padlock Provides Maximum Strength, For High Security, Gates, Trucks & Heavy Security Hasps, Freight Line & Automotive Security, Resistant To All Weather. The ASSA SR400 Dial Puck Lock is a shackleless resettable combination padlock with an auto-back sliding dust cover. These unique padlocks were designed for a wide variety of commercial applications. Solid steel lock body with chrome plating or electric black coating. Includes four dials with 10,000 possible combinations; easy to reset your combination at any time with true keyless convenience. No Springs To Rust Or Jam, No Outside Shackle To Cut Or Saw, Solid One Piece Steel Case.