10 Sizes Self-Tapping ScrewsYou will receive 10 sizes of self-tapping screws. Their sizes are M2 x 4mm/5mm/6mm, M2.3 x 5mm/8mm/10mm, M2.6 x 6mm, M3 x 4mm/5mm/6mm, each size has 50 pieces. Enough to meet your daily needs.Premium Quality ScrewsThe series of self-tapping screws are made of carbon steel with high strength and black oxidation treatment. They have strong resistance to rust and corrosion even in humid environments.Deep Thread and Cross Head Self-drilling wood screw does not need to be used with the nut. The screws have been designed to produce a tight screw and hold well when unscrewed/rescrewed.Convenient to StoreThis 500pcs screw set is well packed and assorted in a plastic box , don't worry about damage or mess. It also comes with detailed sizing information. The box design is nice and easy to unscrew.Wide Application The round head screw set can be used for computers, phones, watches, glasses, electronic devices, electrical appliances, furniture , toys, automobiles or any other repair that requires small screws.