Car reamer with left hand slow spiral flutes and a reduced Tri-flats shank, nominal diameter 0.5000" (1/2") with an overall length of 5.7/8", a flute length of 3.3/4" and 2.5/8" starting taper, according to ANSI standard for enlarging holes or correcting misalignments, HSS with steam tempered-bronze finish for machining free machining and plain carbon steel, copper or copper alloys