Used with a vintage drill to drill 2 1/4 inch wide candle holes for our wedding decoration. The self-tapping screw is very aggressive at first. So get ready It grabs the wood and pulls itself (or your log) up with a force that is difficult to control. As soon as the cutting blades touch, the thing slices like butter. You will definitely need an air hose or shop vacuum to remove sawdust and wood debris, especially when drilling vertically. After 40 holes 2 1/2 inches deep, the bit was as sharp as it was in the box.