Drill stills that are used for making hole in the wall or help us to make hole for set up other tools are very sharp tools of drill. They are made from steal bar, the process start by using a machine to shave the steal bar and then a sharper machine to sharp the top of the bar and then make a hole on the steal bar. The next, a machine will cut the top of the bar off. Then the other machine shape the bar and make a blade from the bar. You can see three blades in the store or four but this company make four blades for more efficiency.
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