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.<br> 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.<br> 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.<br> Convenient to storeThis 500 piece 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.<br> 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.