What brand of drill iron?
A drill for drilling ironThe drill material is usually made of high speed tool steel or carbide, and high speed steel is often used in the factory. When drilling, it will be added coolant according to the different materials and rotating speed.
There are many kinds of drill bits, mainly based on their different uses, which is what to drill and what kind of drill bits to use.
The key of the bit selection is not the brand, but the choice of the drill bit.
