Strength: Tests have shown that the die cast keeper is significantly stronger than traditional pressed metal keepers.

Security: The keeper hook interlocks into the die cast metal rolling cam on the lock.

Rigid: The die cast keeper stays in place and won’t scratch the bottom sash rails as the sashes bypass.

Bracket Protection: The spring support brackets are recessed into the sash rails as illustrated right to prevent accidental damage as the sashes are pushed down to the stop.

Heavy Duty Stops: The top and bottom sashes when fully opened run into custom moulded heavy duty nylon sash stops that are designed to be punished.