Glossary of Door Hardware Terms
Back-to-back Handle
A handle set, often a pull handle or T-bar handle, where the handles are mounted on either side of a door and are fixed to each other.
Inline Door Handle
A door handle where the lever is directly in line with the key cylinder.
Lever/lever Door Handle
A set of door handles with a lever on both the interior and exterior side of the door.
Lever/pad Door Handle
A handle set featuring a lever on the inside and a fixed pad on the exterior.
Patio Handle
Hardware specifically designed for patio doors, which may be sliding or French-style.
Sprung Door Handle
A handle with an internal spring mechanism that returns the handle to a horizontal position when released.
Pull Handle
A non-latching handle that is pulled to open or close a door.
Euro Profile Cylinder
A lock cylinder that is oval- or teardrop-shaped in profile and is common on uPVC and other multi-point locking doors.
Multi-Point Lock
A locking system for doors that secures the door at multiple points along the door frame when engaged. These can feature combinations of hooks, rollers, and deadbolts.
Keep
The component of a locking system installed on the door frame that receives the bolt(s) to secure the door.
Keep Packer
Spacers used to correctly align the lock keeps with the door's locking points.
Slave Lock
A secondary locking mechanism used for the inactive leaf of a French door or other double-door set.
Shootbolt
A locking bolt, often found on the top and bottom of a multi-point lock, that shoots into the door frame to provide additional security.
Escutcheon
A decorative or protective plate that covers the lock cylinder or keyhole on a door.
Letterplate
A fixture on an exterior door for receiving mail.
Letterplate Sleeve Extender
An attachment that lengthens a letterplate to accommodate a thicker door.
Numeral
A number plate or individual digit for a door.
Spyhole
A number plate or individual digit for a door.
Cylinder Guard
A protective fitting that covers and reinforces the door cylinder to prevent tampering.
Door Knocker
A metal fixture on an outer door that is used to knock for entry.
Door Hinge
A mechanical bearing that connects the door to its frame, allowing it to pivot open and closed. A flag hinge is a specific type used on uPVC doors.
Friction Stay Hinge
A type of window or door hinge that holds the window or door open at a selected position.
Door Restrictor
A device that limits the maximum opening of a door for safety and security.
Sliding Door Chain
A safety accessory that allows a door to be opened slightly while remaining on a chain.
