2-Pack Security Door Restrictor Steel Window Guard Lock Entry Door Chain-Free Locking Latch for Window Door

Choose the correct location for the door and align its main body with the subframe, then make marks;2.Attach the main body to the door frame with screws;3.According to the mark, attach the subframe to the door with screws;4.Close the door and test the product.Important note during installation:1.The door and the door frame must be level;2.If the door is concave, the gap between the door and the door frame must not exceed 0.5 cm;Contents:2 x Door Security Chains12 x Screws