Security & Lock Glossary
Understanding security terminology can help you choose the right lock, padlock or security product for your property, equipment or business. This glossary explains common lock and security terms used across commercial, industrial and domestic security applications.
Whether you are securing gates, storage units, warehouses, vehicles or personal belongings, this guide covers many of the most commonly used lock and security terms to help you make informed decisions.
A
Access Control
A security system used to control who can enter a building, room or restricted area.
Anti-Cut Padlock
A padlock designed using hardened materials to resist cutting attacks from bolt cutters or saws.
Anti-Drill Lock
A lock fitted with hardened components to help resist drilling attacks.
Anti-Pick Lock
A lock designed with additional security features to make lock picking more difficult.
Anti-Snap Cylinder
A euro cylinder lock designed to resist snapping attacks commonly used against uPVC doors.
B
Brass Padlock
A corrosion-resistant padlock commonly used for outdoor and general-purpose security applications.
Bullet Lock
A compact, heavy-duty lock often used on vans, commercial vehicles and industrial applications.
C
Cam Lock
A compact lock commonly used on cabinets, lockers, post boxes and vending machines.
Closed Shackle Padlock
A padlock with minimal exposed shackle designed to resist bolt cutter attacks.
Combination Lock
A lock opened using a numerical code instead of a physical key.
Container Lock
A heavy-duty security lock designed for shipping containers, storage containers and site units.
Corrosion Resistance
The ability of a lock or security product to resist rust and environmental damage.
D
Deadlock
A lock that can only be opened using a key, commonly used on external doors for increased security.
Disc Padlock
A circular-shaped padlock with a protected shackle, often used for storage units and garages.
Double Locking
A mechanism that secures the lock bolt in place to resist forced entry attempts.
E
Euro Cylinder
A common lock cylinder used in uPVC, composite and wooden doors throughout the UK.
External Security
Security products specifically designed for outdoor use and exposure to weather conditions.
F
Fixed Shackle Padlock
A padlock with a non-removable shackle designed to improve strength and reduce tampering risks.
Flush Bolt
A door bolt fitted into the edge of a door to provide additional security.
G
Gate Security
Locks, bolts and security products designed for gates, fences and perimeter protection.
General Security Hardware
A broad term covering locks, hinges, bolts, chains and other physical security products.
H
Hardened Steel Padlock
A padlock manufactured from hardened steel for improved resistance against cutting and drilling.
Hasp & Staple
A metal fastening device used with a padlock to secure sheds, gates and storage units.
High Security Lock
A lock designed with enhanced resistance against picking, drilling, snapping and forced entry.
I
Insurance Rated Lock
A lock tested and certified to meet insurance or recognised security standards.
Integrated Locking System
A group of locks designed to work together within a larger security setup.
J
Jam Resistant Lock
A lock designed to reduce the risk of internal mechanism failure or obstruction.
K
Keyed Alike
A system where multiple locks can be opened using the same key.
Keyed To Differ
A locking system where each lock operates using its own unique key.
Key Retaining Padlock
A padlock that prevents the key from being removed while the lock is open.
L
Latch Lock
A lock that secures a door using a spring-loaded latch mechanism.
Lock Body
The main housing of a lock containing the internal mechanism.
Locking System
A collection of locks designed to operate under a planned key arrangement.
M
Marine Padlock
A corrosion-resistant padlock designed for marine and coastal environments.
Master Key System
A locking setup where individual locks have unique keys but can also be opened by a master key.
N
Night Latch
A surface-mounted door lock commonly fitted to residential front doors.
O
Open Shackle Padlock
A traditional padlock design with a fully exposed shackle.
Outdoor Security Lock
A lock specifically designed to withstand rain, moisture and harsh outdoor environments.
P
Padlock
A portable lock used to secure gates, chains, sheds, lockers, storage units and equipment.
Panic Hardware
Emergency exit hardware designed to allow quick escape during emergencies.
Perimeter Security
Security measures used to protect the outer boundary of a property or site.
Q
Quick Release Lock
A lock designed for fast unlocking during emergency or operational situations.
R
Rim Cylinder
A lock cylinder commonly used with night latches and surface-mounted locks.
Roller Shutter Lock
A lock specifically designed to secure roller shutter doors on residential, commercial and industrial properties.
S
Security Chain
A hardened chain used with a padlock to secure bicycles, gates, equipment or machinery.
Shackle
The U-shaped metal bar of a padlock that passes through the item being secured.
Shrouded Shackle Padlock
A padlock with added metal protection around the shackle to resist cutting attacks.
Site Security
Security products used to protect construction sites, temporary buildings and equipment.
Stainless Steel Padlock
A corrosion-resistant padlock suitable for marine and outdoor applications.
Storage Unit Security
Locks and security products designed to protect self-storage units and containers.
T
Tamper Resistant Lock
A lock designed to resist unauthorised interference or forced entry attempts.
Trailer Security Lock
A security product designed to protect trailers from theft or unauthorised towing.
U
uPVC Door Lock
A locking system commonly fitted to uPVC doors, often using euro cylinders and multipoint locking mechanisms.
V
Van Security Lock
An additional locking system designed to improve the security of commercial vans and vehicles.
X
X-Series Lock
A product naming term sometimes used by manufacturers for specialist high-security lock ranges
Y
Yale Lock
A commonly used term for a cylinder-based night latch lock fitted to residential doors.
Z
Zinc Alloy Lock
A lock manufactured using zinc alloy materials, valued for its durability and ease of manufacture, typically finished with a surface coating to provide protection against corrosion.
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