【Package Include】You will receive 10 pieces of window sash locks, comes with 40 pieces of screws; and window sash locks hole to hole measurement is 53mm. Sufficient quantity can meet your various uses and replacements in your daily life.,【Unique Design】This sash lock adopt cam action hook design that draws the keeper tight when locked. Installing this kind of window lock on your window can effectively prevent thieves. Your home is safer and more comfortable.,【Rust-proof & Durable】Window latch replacement is made of zinc alloy material and a multi-layer electroplating process well-built, high hardness, good wear resistance, corrosion prevention, anti-rust, more durable than plastic window sash locks.,【Easy To Install】First determine the installation positions of the window lock,then you need to use a drill to make holes in your window, Finaly fix the window lock and fixer on the window with a screwdriver and screws. Very simple operation can effectively protect your family.,【Widely Used】Our window security locks can be applied for horizontal, vertical single, double-hung sliding windows constructed of aluminum, wood, and vinyl materials also can be used sliding doors. If you receive the product has a problem, please contact us in time, we will give you a satisfactory answer.