Sometimes the job is obvious: a key snapped in the cylinder, a deadbolt that spins without catching. Other times you know something is wrong but not what to ask for. Either way, start here. Each service page describes the symptoms, the fix and what to have ready.
A broken key is not a reason to break the lock. Extraction tools reach the fragment, the cylinder is inspected for damage, and a fresh key is cut from the pieces or from the code stamped on the original.
Most home locks were whatever the builder had on the truck, and the strike is screwed into softwood trim rather than the framing. Upgrading those fixings and the bolt behind them is unglamorous work that changes how a door resists a shoulder.
If a key has been lost, lent or copied more times than you can count, a restricted key system ends the uncertainty. Every key is numbered, every copy is authorised by you, and the old keys simply stop opening anything.
For multi-tenant buildings, the entry door, the mailroom, the mechanical room and each suite need their own place in a key plan. Commercial services include designing and installing that plan and keeping it workable as tenants come and go.
This group is for drivers. It covers openings, replacement keys and fobs, key programming, broken-key extraction from doors and ignitions, and ignition repair.