I used a bladed bit to drill holes in some landscaping logs and was only able to drill about an inch before I had to pull it out to clear the wood chips otherwise it will hang. I bought this piece and it's like piercing butter with a hot knife. I stacked them three high and ran rebar through them to anchor them to the ground. What difference does it make that the drill makes a difference compared to using a paddle drill for those deep holes. It's also very sharp and cuts very clean holes.