Prior to the introduction of PennLock, the only way to disconnect and re-connect chains was to use clumsy and cumbersome tooling which was not only time consuming but ran the risk of damaging the chain. This is why we developed Pennlock, this optional extra uses a threaded pin and a locking nut, meaning that Pennine’s PennLock can drastically reduce the time taken to join the chain, while also making the whole process much easier.