Rafstya Made of premium carbon steel, they are strong and .30pcs long screws and short screws for choices.The long screws are the special position screws.The short screw features flat with self tapping design.Easy to screw in and perfect length.Package Contents:30 x long round Mount Screw30 x short Flat Mount ScrewOnly 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.