IRWIN Unibit Self-Starting Step Drill #10235, HSS, 10 Hole Sizes, 1/4 to 1-3/8″ Hole Dia.

High Speed Steel Speedpoint Step Drill Bit
1/8″ Step Length, 7/16″ Hex Shank, Bright Finish

Features:

• Multiple Hole Sizes 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 and 63 on the Rockwell “C” scale. 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.

Specifications:

Manufacturer Part # 10235 UPC # 038548101057 Minimum Hole Diameter (Inch) 1/4 Maximum Hole Diameter (Inch) 1-3/8 Drill Bit Material High Speed Steel Drill Bit Finish/Coating Bright Number of Hole Sizes 10 Shank Type Hex Shank Diameter (Inch) 7/16 Step Length (Inch) 1/8 Hole Diameter (Inch) 1/4 to 1-3/8 Point Type Speedpoint Step Increments (Inch) 1/8 Drill Bit Grade General Purpose

See all IRWIN Unibit Self-Starting Step Drills