Master Mechanic, 19/32" x 6", silver & Deming, high speed steel BLACK oxide/titanium drill bit, jobber length, 1/2" reduced shank, 3-1/8" flute length, BLACK oxide finish allows improved chip flow & increases abrasion resistance, recommended for drilling wood, plastic & soft metals, used in machine shops using screw machines or where the maximum chuck capacity is 1/2", Carded.