LIUHUI 4 Pack Adjustable Sliding Window Locks Window Wedge Window Stop for Home Office and Car by Multi Vise Tool  (Pack of 1)

Size: Window locks length: 2.4 inch, width: 1.6 inch, height: 1 inch. Packing: 4 Pieces. Color:Grey Note: Fit on window rail thickness rang from 0.59" to 1.26" and track high more than 0.59". Please measure the thickness of your window rail carefully. Install: Close or open the window before installing the window stop block; insert the leg tightly into the window groove, turn the knob clockwise until the product is fixed. Use 2 locks in heavy windows/doors to increase security... Advantage: Rubber irons and window stoppers are covered with rubber can increase friction and avoid scratching windows and noise.