This QTEATAK Kit contains 240 replacement screws for laptop SSD drives. The screws are made of alloy steel with a black oxidized finish and come in 12 commonly used sizes. The kit includes: M2 x 3 (20 pieces), M2 x 4 (20 pieces), M2 x 5 (20 pieces), M2 x 6 (20 pieces), M2 x 8 (20 pieces), M2 x 10 (20 pieces), M2.5 x 4 (20 pieces), M2.5 x 5 (20 pieces), M2.5 x 6 (20 pieces), M2.5 x 8 (20 pieces), M3 x 5 (20 pieces), and M3 x 8 (20 pieces). The total weight is 0.1 kg. Please keep away from children due to small parts.