Strike Plates and Keeps in Multipoint Lock Systems

In a multipoint lock system, the strike plate, which is also commonly referred to as a keep, is the frame-mounted component that receives the locking points when the door is closed and locked. Although it doesn’t move and often goes unnoticed, the strike plate is essential to proper door operation, alignment, and security.

Function of a Strike Plate in a Multipoint Lock

Every locking point on a multipoint lock needs a fixed surface to engage with. The strike plate provides that surface. When the handle is lifted or the lock is thrown, the locking points move into the strikes positioned along the frame.

• Supports the locking points under load
• Helps pull the door tight against the frame
• Maintains consistent alignment from top to bottom

If the strike plate is worn, incorrect, or poorly positioned, even a new multipoint lock can feel stiff or unreliable.

Strike Plates vs. Keeps in Door Hardware

The terms strike plate and keep are often used interchangeably. In practical terms, both describe the same frame-mounted receiving hardware. In multipoint systems, the visible plate and the shaped receiving pocket are usually integrated into one piece, designed specifically for the locking point style being used.

Common Strike Plate Styles for Multipoint Locks

Multipoint locks use different types of locking points, and each requires a matching strike:

• Hook strikes for hook bolts that engage behind the frame
• Roller strikes that allow adjustable door compression
• Mushroom cam strikes designed for anti-lift and sealing pressure
• Deadbolt strikes with reinforced openings for square bolts

Matching the strike to the locking point is critical. A mismatch often results in poor engagement or premature wear.

Strike Alignment and Door Performance

Strike plates are frequently adjustable to compensate for minor door or frame movement. Correct alignment allows the lock to engage fully without forcing the handle. When strikes are misaligned, common symptoms include hard-to-lift handles, incomplete locking, or doors that pop open under pressure.

When Strike Plates Should Be Replaced

Strike plates are often replaced during servicing or lock upgrades, especially when:

• Locking points no longer line up correctly
• The strike shows visible wear or deformation
• A different multipoint lock style is installed
• Frame movement has affected door fit

In many cases, correcting or replacing the strike plate restores proper operation without the need for a full lock replacement.