Lion Locks Aluminum Sliding Door and Window Lock, Pack of 10

This double thumb screw from Lion Locks is constructed from heavy-duty extruded aluminum, It utilizes a double thumbscrew design for added gripping power to mount onto your window track, or sliding door, and help securely lock your sliding windows or sliding doors in a closed or ventilating position. This lock requires no tools for installation. Use these to prevent a window or sliding door from being forced open from the outside etc... Easy to attach - just place the slider lock on the upper or lower track of any sliding window or door. (Use 2 per window or door: one on top, one on the bottom for best efficiency). Inner vinyl lining prevents scratching damage. These slider locks are perfect for patio doors, sliding glass doors, sliding windows, retractable screen doors, or sliding storm windows. 2 inch wide.