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