[Quality Material] Manufactured using quality nylon for robustness and durability, These window screen clips are not easy to fracture, While the accompanying screws are made of stainless steel, This construction assures durability as they are hard to break, Their ensures seamless matching with your existing [Proper Size] Each storm window clip measures about a total length of about 0.9 inches and an offset of 3/8 inches, And the accompanying M4x 25mm screw measures about 1 inch/ 2.5cm in length and 0.15 inch/ 0.40 cm in width, No need for additional purchases [Sufficient Quantity] You get 24 screen installer clips with 24 well-fitted screws for ease of use, Making it a handy solution for your [Multipurpose Application] The window retainer clips are primarily applied to secure on fixed-screens, storm , and storm panels, With its wide range of uses, They hold the screen on, But also swivel to allow removal of the screen, The black color blends into the frame and you can't even see them.These clips enhance your day-to-day living by being a reliable tool [Easy Installation] To secure your window screens, All you have to do is drill a hole in the window frame, Fix the screen and the window clips, Then rotate them into position with your thumb and forefinger on the extended part of the clip 24*window screen clips Color: Black Material: plastic Package Contents: 12*window screen clips Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.