The IRWIN UNIBIT HSS Fractional Self-Starting Step Drill #5, 1/4″ – 1-3/8″, is ideal for drilling clean, smooth holes in mild steel, copper, bass, aluminum, plexiglass, wood, and laminate. Crafted of high-speed steel, it has a SpeedPoint tip that guarantees fast starts* and a single-flute cutting edge for drilling true, round holes with a precise step control for multiple sizes. Hole sizes are permanently laser-etched on the inside of the flute and will not wear away for easy identification throughout the life of the bit. The bit features a quick change hex shank that secures easily in the drill chuck.

• SpeedPoint tip for fast starts.*
• Geometry of single-flute cutting edge drills true, round holes and provides maximum step control.
• Also available with (TiN) coating for longer life
• New SpeedPoint tip penetrates faster than previous Unibits and prevents walking
• Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates

Applications:

• Metal Drilling
• 1/8″ steps