Do I need a drill?

Yes. SharpTool 2.0 is a drill attachment, so you need a drill to use it.

Proper use requires a compatible drill and safe working practices.
For safe use, keep drill speed at 1200 RPM and use light pressure, let the grinding head do the work.

Use a drill with variable speed. Set it to a low/controlled speed and stay ≤1200 RPM.

If you’re unsure, start slower and increase gradually.