1.Made of carbon steel, it is very convenient to repair the laptop. 2.24 kinds different sizes, total 720 pcs. 3.Packed in a plastic box,can be used for compatible with all universal laptop, such as Gateway etc. 4.Storage: These screws stored in a transparent plastic box, convenient for your storage and use. 5.Notification: The package contains small parts, please let it leave children away to prevent accidental eating! Item: laptop screw set Colour: black Material: carbon steel Package Contents: 720 x Countersunk Screws (M1.4 x 4mm, M1.4 x 6mm, M1.4 x 8mm, M1.7 x 4mm, M1.7 x 5mm, M1.7 x 6mm, M1.7 x 8mm, M2 x 4mm, M2 x 6mm, M2 x 8mm, M2 x 10mm, M2.5 x 4mm, M2.5 x 5mm, M2. 5 x 6mm, M2.5 x 8mm, M2.5 x 10mm, M2.5 x 12mm, M3 x 4mm, M3 x 6mm, M3 x 8mm, M3 x 10mm, M3 x 12mm, M3 x 14mm, M3 x 16mm, 30 screws each) Only the above package content, other products are not included. Note: Light 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.