Irwin 10220 Unibit #20 9/16" to 1" Step Drill Bit

High Speed Steel Fractional Hole Enlarging Features:

• Single-flute cutting edge for better control through steps
• 3 flatted shank limits slipping in drill chuck
• Patented single-flute cutting edge offers the user a true round hole every time
• Excellent for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates
• Pilot hole is required
• Description: #20
• Holes Sizes: 9/16" -1"
• Number of Holes: 8 Steps
• Maximum Material Thickness: 1/8"