Irwin 10231 UniBit #1 Step Drill Bit with 13 Hole Sizes

Features:

• Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates
• Single-flute cutting edge for greater control through steps
• Patented single-flute cutting edge gives the user a true round hole every time
• 3 faltted shank prevents slipping in drill chuck
• New SpeedPoint tip penetrates faster than previous Unibits and prevents walking