This is my first auger bit that I bought for drilling small stumps. I chose 7/8" because the stump was less than 12" in diameter. I was using a DeWalt 1/2" cordless drill with the clutch set for drilling and the transmission in low gear, and this was the first time I've changed gears. Hold the drill tight because this drill bits into the material and gone! sharp and easily drilled the 6-8" vertical holes I needed in three stumps.