When viewed along a central axis, a start point phase of a first discharge flute falls within a range of not less than +10 and not more than +90 with respect to a central edge, an end point phase of the first discharge flute falls within a range of not less than 40 and not more than 0 with respect to the central edge, a start point phase of a second discharge flute falls within a range of not less than +10 and not more than +90 with respect to an outer peripheral edge, and an end point phase of the second discharge flute falls within a range of not less than 40 and not more than 0 with respect to the outer peripheral edge. The first discharge flute includes a first front flute portion, and a first rear flute portion contiguous to the first front flute portion.

An annular hole cutter includes a cutter body having cutting teeth and a plurality of flutes extending from the cutting teeth around a side wall between a first and second end, with the flutes separated from each other by a land. The hole cutter includes side walls defining primary and secondary flutes with each one of the primary flutes defining first and second helix angles, and with each one of the secondary flutes defining a third helix angle and a fourth helix angle, with the second helix angle being greater than the first helix angle.