The answer is usually we do, but occasionally a door may require a specialist lock, part or lock mechanism which might not be stocked on the van. We would say 90% of the time; we would be carrying all the parts required to fix/replace the lock. If we have to make a second visit to your property to finish fixing a lock, we only charge a single call out charge; no charge will apply to the 2nd visit. We only fit the best quality locks, and a guarantee covers all parts and labor.