Detachable Restrictor

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Key release restrictor stay for use with Sterling and Storm Balanced heavy duty hinges


  • Can be used on top hung and side hung vents
  • Non handed product to reduce stock inventory
  • Key sold separately
  • Easy to fit with no routing required
  • Full Technical and Sales Support available
  • Manufactured from Austenitic* stainless steel for high corrosion resistance
  • 12 Year Guarantee (details available upon request)
  • Suitable for 16mm-18mm hardware cavity
  • Composite stainless steel and plastic slider for strength and maximum wear resistance

*Austenitic 304 stainless steel for high corrosion resistance


  • Reference BS 6375-2 Load bearing safety devices, SIS 212 and EN 1670

  • New York City Department of Health and Mental Hygiene Approved (NYCDoH)  

Important Note: all separate restrictor variants have been tested and proven to comply with the relevant standards when tested on windows in conjunction with variable geometry friction stays produced by Securistyle. Should the products be used with other hinge types, it is the responsibility of the window fabricator or Systems Company to prove their suitability in use and compliance with relevant standards and/or legislation.


Product Codes

Detachable Restrictor
Partcode Track Length (mm) Pivot Arm Length (mm)
SDR4 150 101.6
SDR6 200 152.4
SDR8 200 203.2
SDR10 250 254
R7437 -- --