High carbon steel, hex shank. Angled cutting edges for faster cleaner cutting. Sizes: 6, 10, 13, 16, 20, 22, 25 and 32mm, plus 300mm extension bar. Be prepared for a variety of jobs with this Silverline flat wood drill bit set. It contains bits in eight popular sizes from 6mm to 32mm, plus a 300mm extension bar for extra reach in those hard-to-access areas. Tri-point cutters and twin side cutters help reduce splintering, while the angled cutting edges ensure faster and cleaner cuts. Each bit has a high carbon steel hex shank to prevent slipping in three-jaw chucks. Perfect for use on wood, chipboard and plasterboard. Pack of eight flat wood drill bits from 6-32mm Fast drilling in wood, chipboard and plasterboard Comes with 300mm extension bar for extra length Angled cutting edges for faster, cleaner cutting 1/4 inch hex power drive shank for three-jaw chucks Includes 6, 10, 13, 16, 20, 22, 25 and 32mm bits Silverline Flat Wood Drill Bit Set 9 Piece Carbon Steel