1material:carbon steel 2finish:polished 3package:blow case 4size:6,8,10,12,14,16,18,20mm 8pcs Auger Bits Set 8pcs Auger Bits Set(wood working tools drill bits cutting tools)Material: Carbon Steel. Finish: Polish Size: 6, 8, 10, 12, 14, 16, 18, 20mm 1/4", 5/16", 3/8", 7/16", 9/16", 5/8", 3/4"OUR PRODUCTS ARE IN GOOD QUALITIES AND HAVE REASONABLE PRICES. 8pcs Auger Bits Set