Counterbore drill bits create a cylindrical, flat-bottomed hole that allows a screw to sit flush with a surface. If you’re making furniture or trying to avoid sharp edges on metal, a counterbore drill bit is a great piece of equipment. You’ll find a wide range of screw sizes and borehole diameters here — all from the highly respected tool brand Trend Snappy. If you’re drilling abrasive materials, choose an option with a tungsten carbide tip.