1. "Tri-circle" lock is very famous all over the world. 2. This lock enhances window security quotient 3. It used widely

This kind of lock could be controlled with keys to open the windows,

 the slid windows could be locked at fixed opening position,

which enhances their security quotiety, is of the mechanical pin tumbler lock category.

It has compact structure, nice surface, high security, stable performance,

 and easy operation etc. features, could be widely used on aluminum and vinyl plastic slide windows equipped in houses, hospitals, hotels, and office buildings.

hot sale Aluminum and Vinyl Plastic Window Lock SH001