Small steel , noise reduction bearing: special bit! Magnesium silicon alloy 1 powerful magnet, new flagship quality screwdriver-small steel Six kinds of ", threads, special for special models, each of the appearance is deduced from maintenance technicians, tough guys, steel", full of vigor Noise reduction, bearing, after 10,000+ times of testing, strictly control the quality, the bearing is not stuck, the duration of one rotation is up to 1 minute Super hard, special bit, on the basis of S2 steel, adding chromium, molybdenum, tungsten, vanadium and other alloy elements to improve hardenability, toughness, wear resistance and heat resistance The ultimate, grip, look and feel improved, giving you a comfortable disassembly experience Colour:grey Material:Metal Package Contents: 6 x Screwdriver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.