PRODUCT INTRODUCTION: 6 Pack cam action sash locks,can be used on both left and right,the distance between the centers of the holes is 2.1 inches GOOD QUALITY: Sliding window sash locks is made from good metal,and it has been well tested by the manufacturer,has good wear resistance,antirust,long service life, can save you time and money WIDE APPLICABILITY: Widely used in horizontal, vertical single and double hung sliding windows made of aluminum, wood and vinyl materials, as well as sliding doors FUNCTION: This window sash lock has a cam action hook that can tighten the keeper when locked. There are also anti pry bolts in the lock body that mesh with the keeper,making it more secure NOTE: Before purchasing, please carefully check the position of the holes and the size of the product are consistent with the product you need, to ensure that it meets your needs. If the position of the holes is different, you may need to drill again. This product does not come with screws EASY TO INSTALL: Firstly, determine the installation position of the window lock, then drill holes at the edge of the window with an electric drill, and finally tighten the window lock with a screwdriver and screws