CRL Window Opening Control Device Kit "A" as required by ASTM F2090-17, the standard specification for window control devices with emergency (egress) release mechanisms. Product will limit the window opening to less than 4” and requires two actions to release the device allowing the window to open fully for egress purposes. Actions to release the device for egress purposes are to be performed without the use of keys, tools or special knowledge. WOCD will automatically re-latch when window is fully closed.