Unibit Metric Self-Starting Step Drills

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IRWIN Tools

Unibit Metric Self-Starting Step Drills


HSS - Multiple Hole Sizes


Features:

  • UNIBIT Step Drills have an exclusive single radial concave flute. Allows the drilling of perfectly round holes in thin materials quickly and with less effort.
  • Each bit is constructed of industrial grade high speed molybdenum steel, and is heat treated to a hardness of between 61 - 63 RC. This assures maximum strength and long life.
  • Use for steel, copper, brass, aluminum and other thin materials
  • Also ideal for drilling through wood, composition board, and even plexiglass and plastics which often crack with standard twist drills.
  • Handle thicker materials by drilling from both sides of work surface
  • Use for reaming, deburring and cutting through soft wood or plasterboard