Locksmith in Old MillRekey. Repair.Replace, if it needs it.

A restricted or patented keyway is one whose blanks are supplied only through the manufacturer's authorised channels, so duplication is controlled rather than available at an ordinary counter, though the exact authorisation step varies by program and is not always a signed letter. For a company with staff turnover, cleaners and contractors, it means the keys in circulation are far easier to track. It can be introduced during a rekey, on the exterior doors only or across the whole premises, and works alongside a key register.

Extractor tools grip the key, not the lock, and are meant to leave the pins, springs and plug as they were: hooks and spirals ride in the keyway grooves beside the fragment and draw it out the way the key travels. It is not certain, though; a deeply lodged fragment or a prior failure can still leave a lock, especially a vehicle cylinder, needing further work. Damage most often comes from what happens before the locksmith arrives, mainly tweezers, screwdrivers and glue, which is why leaving the keyway alone matters.

Rekeying keeps your existing deadbolt or handle set and gives it a new key, commonly by changing the pins inside, though some cylinders reset a different way. Replacing removes the whole lock or cylinder and fits new hardware. Rekeying suits locks that are in good condition and simply need a fresh key. Replacement is the better call for hardware that is worn or damaged, built to a low grade, on a keyway the other doors cannot share, or due for a change of style or a keypad.

A keyed interior cylinder means finding a key to get out, which is not what you want on a door people use every day. The steadier answer for a door with glass is a single-cylinder deadbolt with a thumb-turn, combined with a reinforced strike, a longer bolt and a security film or laminated glass in the sidelight.