Used today for drilling tree stumps for injecting potassium nitrate with a DeWalt cordless drill. I had 4 dead ash stumps measuring 18" to 30" in diameter that I wanted to remove, so I drilled 4-7 full size corner holes. I've used 2 of my 5 amp batteries and twisted my wrist a few times but this bit is sharp, strong and unrelenting. I would recommend this beat to everyone!