6 Pieces Drill Bit HSS Hex Shank M3-M10 Thread Tap Screw - Silver: Features: Material: 4341 High Speed Steel, Made of high speed steel (HSS), high hardness and rust resistance for extended service life.Size: M3x0.5, M4x0.7 , M5x0.8, M6x1, M8x1.25, M10x1.5. 6 sizes set, which perfectly meet your different needs.A sharp, hardened drill bit induction, resistant to slightly induced wear, to ensure puncturing speed, improve work efficiency. Complete drilling, tapping, deburring and countersinking in one operation saves processing steps and time costs, improves the ;working efficiency.6 steel drill bits, suitable for drilling wood, plastic, thin copper, aluminum and other soft metals (5-6mm) , not for hard materials (e.g. steel sheet).When you drill a hole, you need to inject water at the same time to cool the drill bit. This will help you increase the value of the exercises. If you cannot cool the drill bit when drilling holes, the drilling speed should not be too high and you should not drill too frequently. Lamp fixture information : Finishing type: SilverItem dimensions L x W x H: 3 x 3 x 3 millimetersTool Flute Type: SpiralSurface Recommendation: Plastic, Wood Package includes: 6 * Drill Bit Note: The size is measured by hand, so there may be an error of 0.5 inches, please note that our product photos are taken in kind.