The HSS sheet metal hole saw drills large holes with high precision. The self-centering drill tip with a cross-cut allows for perfect centering without wandering when drilling materials of low thickness. The precision-ground drill features a straight flute for smooth drilling with high cutting power. This product can drill large holes in thin materials such as metal sheets, profiles, pipes, and other materials without pre-drilling. It is also ideal for deburring and enlarging already drilled holes without cold welding. It is used for non-ferrous metals, steel sheets, and plastics. The countersink has a hexagonal shank (1/4 inch) for high power transmission and quick bit changes.