These were purchased to drill holes in steel (snow blower wheel) to install the 'Clarence Impeller Kit'. The combination of the short overall length (which makes the bit relatively stiff) and the hex end (which allows me to use a 12" hex extension to reach the body) made this easy. I bought a total of four of these bits because I was concerned that I would break when drilling a total of 18 holes, but I only broke one of them and this was done by dropping the drill bit, extension and bit on the concrete floor which is beautiful , round holes are drilled and evenly sharpened right out of the box.