I did like that a tap and drill selection chart is included in the case ... Most good-quality drill bits are made of high-speed steel. Often these bits are coated with black oxide or titanium ...

We calibrated the drill press rpm to match the bit size and material based on this chart ... speed trigger made it more difficult to maintain a slow, precise speed for drilling steel.

Both an impact driver and a drill accomplish this task using rotational force (torque) and rotational speed (measured in rotations per minute). Impact drivers have much more torque and faster ...

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