- The product itself is very well made and solid. However, an additional barrel has to be purchased to complete the locking mechanism. I required the lock as a replacement for one that had been damaged in a botched job by an inexperienced "craftsman". If the lock is required as a replacement check all measurements fully because some dimensions have changed from earlier versions and, as with all locks, a few mm can make a big difference to the ease of fitting and the degree of additional work required. It is an expensive lock but it is the only real option for a very narrow fitting. Only Ironmongery Direct appear to have it for sale. If a lock of these narrow dimensions is required, this is a good lock and will withstand wear. Most wooden doors would break before damage could be done to the lock.