ALOA ICPL key terms

A fixed obstruction inside a lock case or keyway that blocks a key from turning unless the key has a matching cut or channel to pass it. Wards are among the oldest key-control features.

The shaped slot cut through a plug that admits the key blade. Its profile, often called the key section, restricts which key blanks will enter and turn the lock.

An uncut key manufactured to a specific keyway profile and blade dimensions. Blanks are selected by section and thickness before duplicating or originating a key.

The numeric or measured depths cut along a key blade that position the tumblers. A bitting list records the cuts for each key in a system, from tip to bow or bow to tip.

The rotating cylinder inside a lock that holds the tumblers and accepts the key. When the correct key aligns the tumblers at the shear line, the plug turns within the shell.

The boundary between the rotating plug and the stationary shell. A lock opens when every tumbler is split exactly at this line so the plug can rotate freely.

The spring-loaded upper pin in a pin tumbler lock that rests partly in the plug and partly in the shell. It must be pushed to the shear line by the key cut.

A driver pin with a narrowed waist that creates a false set position and traps the plug against the shell. Spools are a common anti-picking feature in medium-security cylinders.

A slim tool used to manipulate individual tumblers to the shear line without the original key. Picking is a legitimate locksmith skill but is regulated in some jurisdictions.

A lever tool inserted into the keyway to apply light rotational pressure on the plug while picking. Correct tension holds picked pins at the shear line.

Changing the tumblers or pins in a lock so that existing keys no longer operate it and new keys do. Rekeying is standard practice after a move, lost key, or tenant turnover.

A compartmented assortment of tumblers, springs, and small parts used to service pin tumbler cylinders. Kits are organized by pin length or diameter so technicians can build a specific bitting.

A key that operates two or more locks that also have their own individual change keys. Master keys rely on split-pin chambers that sit at two different shear lines.

The individual key that operates only one lock in a master keyed system. A change key will not operate other locks in the same suite or building.

The deliberate design of a keying system so that selected keys operate groups of locks while lower-level keys remain restricted. It requires careful pinning math and documented bitting lists.

The policies and records that limit who may obtain, copy, or hold keys. Good key control includes signed issuance logs, restricted keyways, and prompt collection of keys at turnover.

A key section that is contractually or physically limited to an authorized dealer or owner. Restricted blanks are not sold openly, which discourages unauthorized duplication.

Making a working key by inserting a blank into a lock and reading the marks left by tumblers, then filing those spots. It is used when no key exists and the lock cannot be removed.

An automotive key containing a small electronic chip that answers an immobilizer challenge before the vehicle will start. Cutting the blade alone will not start the car.

A vehicle anti-theft system that disables the starter or fuel until it reads a recognized transponder or smart key. It requires electronic matching, not just mechanical key cutting.

The process of pairing a new or replacement electronic key to a vehicle's computer using diagnostic equipment or an onboard procedure. Programming is separate from cutting the mechanical blade.

The standardized diagnostic connector under a vehicle's dash used to communicate with onboard computers. Many key programming tools connect here to add or erase keys.

The unique seventeen-character vehicle identification number stamped on a vehicle and its documents. Locksmiths verify it before originating keys to confirm they are working on the correct car.

A safe combination lock meeting a recognized testing standard for resistance to manipulation and drilling. Group ratings tell a technician what level of attack the lock is designed to survive.

Opening a combination safe lock by sensing the internal wheel positions through feel and sound rather than force or drilling. Manipulation-resistant locks use false gates and other countermeasures.

A spring-loaded bolt that fires if the lock is punched, drilled, or removed, permanently blocking the safe's boltwork. Relockers are a key defense against forced entry.

The assembly of bolts, linkages, and plates that secures a safe door to its frame. The lock only releases the boltwork; the bolts themselves provide the holding strength.

The graduated ring around a safe's combination dial that provides the reference index for numbers. Correct alignment with the index mark is essential when dialing a combination.

Documentation such as a title, registration, or lease that shows a customer is entitled to service on a lock, vehicle, or safe. Locksmiths record it before opening or rekeying.

Legal responsibility for harm or loss caused by a locksmith's work, such as a faulty installation that allows a break-in. Insurance and careful documentation help manage this exposure.

A written record of the service requested, the work performed, parts used, and the price charged. A signed work order protects both the customer and the technician.

State or local requirements that a locksmith register, pass a background check, or hold a credential before offering services. Requirements vary widely by jurisdiction.

A lock whose bolt is thrown and retracted by a key or thumb turn rather than a spring latch. A deadbolt resists forced entry far better than a spring latch.

The metal plate on the door frame that receives the bolt or latch. A weak or poorly aligned strike plate undermines an otherwise strong lock.