Hardness and durability:
✔ Twist drill bits are made of high-speed steel for high hardness and durability.
✔ This set contains 5 pieces of drill bits in different sizes of the most common drills.
✔ Thanks to the extra long cutting edge, you can drill deep holes with these bits.
✔ They are ideal for most drilling jobs and materials such as aluminium, wood, plastics.
✔ Sharp twist drills make drilling easier and more effortless.