10Pcs Hss Twist Drill Bits 0.15" Dia 3" Length Tip Straight Shank Drilling Bit

Attributes:* Bit Diameter: 4mm / 0.15"* Shank Diameter: 4mm / 0.15"* Flute Length: 45mm / 1.7"* Total Length: 75mm / 2.95"* Material: HSSWhat Is Included:* 10 Piece x Twist Drill BitsApplications & 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 and twisted flute 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.