I'm not one to write bad reviews but thought I'd share my experience with this drill bit. I have noticed a slight wobble after drilling 6 holes in 5/4 inch pressure treated decking. At first I thought the cartridge was loose, but it wasn't. I rolled the racquet on a flat surface and you could see that it was bent. I know that this type of wood is difficult to use for nozzles and that this nozzle is probably not used for decking in general, but it should have lasted longer. Since then I have bought a better quality racket.