Yale Lockmaster 21

The Lockmaster 21 Multipoint Door Lock exemplifies the pinnacle of British engineering, delivering outstanding performance, enhanced security, and unwavering reliability. Designed, developed, rigorously tested, and manufactured entirely in the UK, this multipoint locking system is the ideal solution for fabricators and installers within the fenestration industry. 

Key Security Features  

  • Three Security Hooks:
    Strategically positioned to provide strong anti-separation resistance and enhanced locking security. 
  • Auxiliary Locking Units:
    Equipped with Lockmaster’s signature hooks and anti-lift pins to defend against door lifting and forced entry attempts. 
  • Two Precompression Rollers:
    Engineered to maintain consistent weather sealing by compressing the door against the frame prior to locking—boosting insulation and durability.  

Specifications: 

  • Unsprung Centre case: 35mm backset featuring a reversible latch for effortless handing adjustments. Includes a push-in latch snib to prevent accidental lockouts. 
  • PZ Centre: 92mm /62mm, compatible with standard handle sets 
  • Faceplate: 16mm Stainless steel (430) Yale-branded faceplate for a clean, professional appearance 
  • One Piece Keep: 13mm Axis One Piece keep: offers maximum security, pleasing aesthetics and enhanced longevity  
  • Profile Compatibility: Designed to work with profile-related packers for precise fitting 
  • Height Extendibility: Can be vertically extended with the addition of shootbolts for increased security and multi-point locking 
  • Packaging: Supplied in boxes of 5 units  

Performance & Certification:

  • PAS24 Compliant– Designed to meet the requirements of enhanced security performance for doorsets 
  • Secured by Design Approved – Meets Police Preferred Specification requirements 
  • BS EN6375-2: Cycle-Tested to 100,000 Operations – Proven mechanical endurance 
  • 10-Year Mechanical Guarantee — Backed by industry-leading warranty support.
  • Included in the Yale Lifetime Security Guarantee — Confidence built to last.
  • Made in Britain — Precision engineered and manufactured in the UK 

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