• Drill sheet metal and aluminum without deforming or distorting

• Titanium nitride coated high speed steel

• 1/4" Shank

3pc Set Includes:

 Six Step Bit: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2"

 Nine Step Bit: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"

 Thirteen Step Bit: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"