High quality laptop screws.Made of carbon steel.It is very convenient for you to repair the laptop. 10 Kinds different sizes,Phillips Rounded Head Screws total 500 pcs;Length is measured from under the head. Model Quantity: M2 x 4mm 50pcs; M2 x 5mm 50pcs; M2 x 6mm 50pcs; M2 x 8mm 50pcs; M2.5 x 4mm 50pcs; M2.5 x 5mm 50pcs; M2.5 x 6mm 50pcs; M2.5 x 8mm 50pcs; M3 x 4mm 50pcs; M3 x 5mm 50pcs.