Casement Restrictor Stays
Casement Restrictor Stays
Safety Stays
Stay Open Restrictor
Detachable Restrictor
ASSA ABLOY Window Opening Control Device

Interlock offers a full range of restrictors for casement and awning window applications – whether you’re looking for a simple venting option with security or an adjustable option for greater opening capability. Our restrictors are designed with state-of-the-art technology to support and control projecting sashes, including special heavy duty options for high weight capacity. All hinges are available in powdercoat or all-stainless-steel; allow for quick and easy assembly and provide maximum sash adjustability.


  • Stay open position automatically selected on opening of window
  • Easy to fit no routing required
  • Enhanced corrosion resistance
  • Suitable in for 11.1 mm to 18 mm cavity heights

1. Casement Restrictor Stays
ASSA ABLOY’s Casement Restrictor can also be used as a friction adjuster.

2. Safety Stays
New York City Housing Authority compliant.under HDLD#03-14-2016

3. Stay Open Restrictor
Securistyle restrictor designed to prevent the window from closing past ‘stay open’ positions.

4. Detachable Restrictor
This Securistyle restrictor can be used on windows without reinforcement. Key available separately.

5. ASSA ABLOY Window Opening Control Device
Tested and certified to ASTM F2090-10, the ASSA ABLOY WOCD is the ultimate solution in residential safety. Available in lengths of 4” or 6”, this restrictor limits venting to less than 4” of opening.

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