Hss Twist Drill Bits Straight Shaft Drilling Bit - 10 / 0.03"X3.9"

Applications & Features:--- The straight shank design is suitable for a variety of electrical drilling machines. Also perfect for electrical drilling on both flat and curved surfaces such as wood, steel, cast steel, malleable iron, etc.--- The sharp spiral groove improves drilling efficiency and makes it easier and less labor-intensive to use.--- Fully ground body with bright finished ensures precision and durability.--- Made of high-speed steel, ensuring its high hardness, durability, wear resistance and heat resistance.Useful Tips:--- Please select the appropriate rotation speed and apply the appropriate amount of pressure. Excessive rotational speed and excessive pressure may cause damage to the drill bit or a decrease in drilling quality.