1.Carbide-tipped tools feature cutting edges of carbide for wear resistance and a steel shank for toughness.

2.Spear point carbide tip shape design for extreme drilling rough tile, ceramics, porcelains and glass, etc. 

3.Round shank is designed for use in power drills, drill presses, and boring machines.

4.Can not be used on hammer mode, for use with rotary drills only.

5.Best result with lower rpm and good cooling with water, vinegar and turpentine.