731DS & 33000L Series Extra High Security Rectangular Padlock with Chain features an e-coated hardened steel padlock and a hardened boron alloy steel chain to resist drilling, sawing, twisting and brute force attacks.

731DS Series:

This padlock adopts rectangular design to limit the spacing and protect against blot cutters when the lock is in place. The anti-drill sliding cover plate provides high standard drilling resistance in cooperation with slide-in slot and anti-drill plate.

DS refers to double slots for going with the chain. To prevent the heavy lock from dropping off, the first slot will be opened prior to the second slot when unlocking. 

33000L Series:

This chain has a protective black vinyl sleeve to protect against scratches and prevent damage to locked item.

Extended end links allow the 731DS to fit better and being more flexible when operating with the chain.  

Application:

This padlock and chain set is ideal for factory and store fronts, motorcycles, entrances, gates, garages, warehouses, sheds, doors, containers, etc.