Review on IVY Classic 01126 32 Inch 118 Degree by Caleb Quade

I wanted to use these to drill some holes in a concrete floor. That does not work. Even after using a different brand of smaller drill bit (which actually worked) to create the pilot hole, I was able to get the drill bit to go through that pilot hole and enlarge the hole to the required diameter. I've tried all the settings on the drill press. No success.