I've had many projects this set made a lot easier Very well done they should last a long time You will need a good powerful drill or drill The neck on these bits is too big for a cheap battery powered drill set I have used them to drill holes for the magnets of different sizes to make tool hangers/organizers and even a modified framed acoustic treatment that can be moved from one place to another.Attached with magnets.These were the original plans I had to get this set, but as I keep expanding my shop, they'll really come in handy.