The Jackloc Perma keyless window restrictor is a permanently fixed solution that prevents tampering and accidental release. It features a 200mm cable for a 100mm opening and has been independently tested to BS EN14351 and BS EN 13126 standards, withstanding 34 stone of static force. The restrictor is made with 16 strands of high tensile stainless-steel cable and is salt spray tested to BS EN 1670. It includes Grade 4 one-way Clutch Head Security Screws. Complies to UKAS BS EN 14351-1: 2006.