How to measure A Multipoint Door Lock

  • Brand - Can be clearly identified etched into the faceplate of the multipoint lock.
  • PZ Centres - This is the centre of the spindle to the centre of the circulr part of the cylinder lock.
  • Backset Size - This is the distance from the spindle centre to the front of the faceplate.
  • Faceplate Size - This is the width of the multipoint lock (visible from inside of the door)
  • Spindle Type - This can be single, split, or split follower (single spindle is most common) A split spindle has individual operation for the inside and outside, but with a different PZ Centre size. Where as the split follower has dual operation with the same PZ Centre internally and externally.
  • End Shape - This can be clearly seen by looking at the top or bottom of the lock.Either Square or Radius (round)
  • Antilift Bolts - These are seen in the same area as hooks and prevent lifting of the door to disengage the lock.
  • Lock Operation - The action which engages the locking points (lift lever, key wind, slam) Slave locks only fire shootbolts and have no more locking points (for use in patio doors)
  • Total Hooks - These can be clearly counted by lifting the handle or engaging the lock.
  • Total Deadbolts - These can be clearly counted by lifting the handle or engaging the lock. the Centre deadbolt is not counted in the purpose of a filter, these are known as a "2 hook Dead/Latch" lock.
  • Total Cams/Rollers - Rollers/Cams depending upon manufacturer are clearly visible circular pins which move up and down when the lever is engaged for compression and security of the door.
  • Total Mushrooms - Similar to the rollers/cams these are clearly visible and server a similar purpose, with a routing to give a "mushroom" apperence.
  • Extendable - Extendable locks give the option to add a shootbolt or height extension to the lock.

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