Screw Details: Material: Alloy Steel (Screws) + Plastic (Storage Box) Quantity: 500pcs Color: Black Weight: 100g - A set of various screws for laptop repair. Suitable for all universal laptops. Such as: B. IBM HP Mac Dell Lenovo SAMSUNG Sony Toshiba Gateway LG etc. Diameter and length: Screw on PM1.2*3 Round head screw PM1.2*4 Round head screw PM1.4*2 Round head screw PM1.4*3 Round head screw PM1.4*3.5 Round head screw PM1.4*4 Round head screw PM1.4*5 Round head screw PM1.4*6 Round head screw PM2*3 Round head screw PM2*4 Round head screw PM2*5 Round head screw PM2*6 Round head screw PM2*8 Round head screw Round head PM2 * 10 Countersunk head KM1.2 * 3 Countersunk head KM1.2 * 3.5 Countersunk head KM1.2 * 4 Countersunk head KM1.2 * 5 Note: - The quantity Since the measurement is made with a precision instrument, please allow for approx. 2% quantity error.