1) Forged in one piece from high carbon steel 2) Arched shape cutting spurs define the hole 3) Remove the chip and increase cutting speeds 4) Long centre point for accurate hole location 5) high visibility stamped size marking for fast and easy identification 6) precision ground hex shank prevents spinning in drill chuck or in bit extension 7) full length heat treatment guards against bending bit in heavy-duty applications 8) used for boring smooth, clean, perfectly defined holes in soft and close grained wood, chipboard and floor board 9) 11pc wood flat bit 10) Sizes: 18mm, 19mm, 20mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 35mm, 38mm