Highly recommended for any contractor who regularly drills concrete to attach items to walls, ceilings or floors. One of the best tools I've bought. completely in panel or 5/16 inch wall anchor hole. Time and effort are greatly reduced compared to a small hand held electric hammer. It's a bit heavier compared to other products on the market (Hilti) but for 1/3 the price with batteries that are generic to other tools I own I can live with a few grams more.