RES-LOK Concealed Restrictor

Our lockable, concealed window restrictor is the ultimate guard in window restriction.

  • Ultimate Window Restriction: Ensures safety and security with automatic locking and engagement.
    Discreet Design: Features concealed fittings for a clean and seamless appearance.
  • Versatile Use: Restricts sash opening to 100mm and includes a dedicated key release for controlled access.
  • Universal Compatibility: Suitable for PVCu, Aluminium, and Timber window styles.
  • Retrofit Friendly: Easily adaptable for existing installations without compromising performance.
  • Built to Last: Constructed from durable stainless steel and zinc alloy for long-lasting reliability.
  • Meets Industry Standards: Conforms to BS EN 14351:2006 Clause 4.8 for quality assurance.
  • Customisable: Supplied in self-colour with optional studs available separately.
Restrictors Arm length Left hand Right hand
Res-Lok 105mm JBC327 JBC328
Res-Lok extended 113mm JBC234/LH JBC234/RH
Res-Lok extra extended 120mm JBC234/120/LH JBC234/120/RH
Stud plates (height) 11.50mm 12.50mm 13.50mm 14.50mm
Res-Lok JBC261/11.5 JBC261/12.5 JBC261/13.5 JBC261/14.5
Res-Lok extended JBC261/11.5 JBC261/12.5 JBC261/13.5 JBC261/14.5
Res-Lok extra extended JBC261/11.5 JBC261/12.5 JBC261/13.5 JBC261/14.5

Note: To ensure correct operation of the restrictor, it is important that the correct stud plate height is used to suit the cavity between the sash and the frame.

Spare Key: JBC486

Related Products

  • Easy fit on all standard Espag windows – no extra drilling required.
  • Contemporary finish.
  • Prevents interference with blinds and shutters.
  • Designed & manufactured in the UK to meet exacting standards.
  • Non-handed (can fit as right or left-hand).
  • Each unit includes 1 handle, 1 key and 2 screws.

Single surface fixing and positive window restriction.

Concealed Door Stop suitable for standard euro groove profiles, the fully adjustable stainless steel and zinc die cast heavy duty door stop provides a discreet control over door opening angles.