24mm U-Channel

Britain's best-selling lock range has been extended to include a 24mm u-channel variant designed for modern aluminum bi-fold doors and features Lockmaster's signature hook and anti-lift pins.

Locking Points 

  • Lockmaster® signature hook and anti-lift pins 
  • Deadbolt centre with an easily reversible latch bolt to minimise stock requirements 
  • Lockmaster® two hook and anti-lift pin variant 
  • Slave mechanism for French door application is avaliable
  • 28mm backset with PZ92mm centre case 
  • Combined 3 piece keep 
  • 2 lock lengths to suit a variety of door heights


  • 24mm U-Channel
  • Yale Branded 


  • PAS24:2016 security tested
  • BS EN 1670:2007 Grade 4 (240hrs. NSST) tested 
  • Tested to a minimum of 100,000 cycles operational lifespan
  • 10 year mechanical guarantee
  • Made in Britain
  • Lifetime Security Guarantee* 


Material Specification 

  • Lock Case: Galvanised Mild Steel 
  • Faceplate: Mild Steel CS4 - ST2473 
  • Deadbolt and Latchbolt: Zinc Alloy Casting 
  • Keeps: Mild Steel, BZP and Clear Trivalent 


Locks: 5 locks per box 


Yale recommends that all moving components are lubricated using a non-acidic mineral oil at least twice a year and surface cleaned with a damp cloth. The product may need to be adjusted to ensure satisfactory operation. 

Product Options
Master lock 28mm b/set, 24mm u-channel, 2 hk & antilift pins- standard length
Master lock 28mm b/set, 24mm u-channel, 2 hk & antilift pins- long length
Adjustable (3 piece) one piece keep LH
Adjustable (3 piece) one piece keep RH