Winlock Boa Window Restrictor The Winlock Boa Window Restrictor is for use on uPVC windows. It initially restricts the opening of the window to 100mm and requires 2 handed operation making it perfect for child safety. The green buttons provide easy fire escape access. It is non key operated and automatically re engages when the window is closed. 100mm initial opening restriction 2 handed operation non key operated Automatic re-engagement British standard exceeded Suitable for use on fire egress applications Fast fit 13mm & 17mm stack height available Arm lengths to suit 60/70mm profile Integral run up block 13mm stack
