This is a heavy-duty extruded aluminum with double thumbscrew adds additional gripping power to securely lock windows in closed or ventilating position. They are easy to install. The double thumbscrews add additional gripping power.
Use with metal-framed sliding doors and older style, metal-framed sliding windows
Note: These locks are for use on sliding patio doors and windows whose metal fins measure 1/4 inch or thinner
Each lock features a pair of counter thumb turn fasteners for adding a strong, sure hold
Heavy-duty cast-metal construction with tamper-resistant double thumb turn screws
This high security sliding patio door and window lock comes in aluminum finish
Easy to install in less than 10 minutes
Used on a variety of sliding patio door systems, in addition to some older horizontal sliding windows
For further dimensional information, please see the line drawing