Abus rock 83cs55mm closed shackle heavy duty fully re keyable through hardened steel alloy padlock with a ball bearing locking mechanism for extra security has a tough through hardened steel alloy shackle as standard with nano protect chrome plating helping to make rusty shackles a thing of the past can be adjusted to operate key retaining or no key retaining automatic locking or key to lock where to use the 83 series range of padlocks offer a medium to high level of security with the ability t