A drill has two to four cutting edges each made of cemented carbide or polycrystalline diamond. Helical flutes are formed alternately with the cutting edges. X-shaped thinning has been applied to the cutting edges. A rake angle of the cutting edges is not less than 30 degrees and not more than 40 degrees. A clearance angle of the cutting edges is more than 0 degrees and not more than 8 degrees. The cutting edges each has a honed face by chamfer honing. A honing angle of the honed face is not less than ?3 degrees and not more than 8 degrees.