Aluminum Secondary Window Locks

The Prime-Line(TM) defender security aluminum secondary window locks are used to secure your window in an open, ventilating position. Made with extruded aluminum, they have a steel thumbscrew and are designed to be used on metal horizontal sliding windows. They fit rails up to 1/8" thick and feature a white finish. The locks are offered in package ok 4 and covered by a 1-year warranty against manufacturing defects.

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