Security β positive locking
The S3™ bolt and keep overcomes inbuilt security weaknesses in modern age windows by using ASL (Anti β Slip & Lock) technology. Intruders use the void areas between the glass and the frame itself to lever the frame out of its channel. The S3™ bolt & keep manipulates the intruders strength so that it works against himself.
The S3™ bolt and keep security features:
Tighter/reliable sealing
The S3™m bolt and keep improve sash management and sealing by using AST (Advanced Sealing Technology)
The S3™ bolt and keep sealing features:


2mm inner tape, which forces a window sash across and closer to its outerframe to ensure constant weatherproofing and reliable noise reduction

Distinctively shaped products that have been designed to naturally interlock and become steadfast only when attacked