Design Hardware KRM Keyed Removable Steel Mullion for 1000R/2000R Series Rim Devices

Usually Ships: 3-5 Days
  • Used to adapt a double door into two single doors
  • For use with non-fire-rated rim devices (1000R/2000R)
  • Mullion can be cut down to size in field

Available Options:


The KRM (Keyed Removeable Mullion) is ideal for double-door applications and can easily be removed in case large items need to pass through the opening.

  • Mortise Cylinder Included (Schlage C Keyway)
  • Turning key in mortise cylinder provides fast and easy means of removing mullion from opening
  • Heavy Duty Steel construction – AL Painted (Prime Coat)
  • Easy removal when full width of an opening is required
  • Self locking when reinstalled without needing the key
  • Increases Security & Minimizes door sag and warpage


1 1/8″ Mortise cylinder with std. cam (included) – 6 Pin Brass, C Kwy, with 2 Keys


Schlage C Keyway

Mullion Tube

2″ Wide x 3″ Depth x 1/8″ Steel

Part Type



689 Aluminum