The Master Lock No. 1596 shackle shroud provides an additional layer of security for your combination padlock system by preventing shackle cutting and shimming. Designed to retrofit easily onto existing combination padlocks, this shroud surrounds the shackle, making it more difficult for intruders to tamper with the lock. The shroud is held securely in place with a back plate and tamper-resistant screws, offering a simple but effective way to increase security.