Irwin Unibit HSS Fractional Step Drill Bit

Irwin 10231 Unibit #1 13-Step 1/4-Inch Step Drill Bit, 1/32-inch Steps (1/8- to 1/2- inches) Save time by eliminating the need to change drills when drilling round holes in thin materials. Each smaller size drill also acts as a pilot for the next size. Patented single-flute cutting edge gives greater control through steps and a true round hole every time. Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. SpeedPoint tip penetrates faster than previous Unibits and prevents walking. 3-faltted hex shank prevents slipping in drill chuck. Drill diameters etched in flute for easy identification.

• Single-flute cutting edge for greater control through steps
• Hex shank prevents slipping in drill chuck
• Also available with (TiN) coating for longer life
• New SpeedPoint tip penetrates faster than previous Unibits and prevents walking

Unibit, 1/4" To 3/4" Step Drill, 9 Hole Sizes From 1/4" To 3/4" In 1/16" Increments, Maximum Material Thickness 1/8", 3 Flatted Shank, Shank Size 3/8", Single Fluted Cutting Edge Assures True Round Holes & Allows Greater Control, Carded.

• Single-flute cutting edge for greater control through steps
• Hex shank prevents slipping in drill chuck
• Also available with (TiN) coating for longer life
• New SpeedPoint tip penetrates faster than previous Unibits and prevents walking

Irwin 10234 Unibit #4 12-Step High Speed Steel 3/8-inch Step Drill Bit, 1/16-inch Steps (3/16- to 7/8-inch) Save time by eliminating the need to change drills when drilling round holes in thin materials. Each smaller size drill also acts as a pilot for the next size. Made from industrial-grade high-speed molybdenum steel heat treated for maximum durability. Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. SpeedPoint tip penetrates faster than previous Unibits and prevents walking. Non-skid tip does away with the need for center punches; 3-faltted hex shank prevents slipping in drill chuck. Drill diameters etched in flute for easy identification..

• Single-flute cutting edge for greater control through steps
• Hex shank prevents slipping in drill chuck
• Also available with (TiN) coating for longer life
• New SpeedPoint tip penetrates faster than previous Unibits and prevents walking

The IRWIN UNIBIT High-Speed Steel 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.

• 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
• SpeedPoint tip for fast starts.*

This IRWIN Unibit #2 High-Speed Steel Fractional Self-Starting Step Drill Bit features a single-flute cutting edge for greater control through each of its 6 steps. The sharp SpeedPoint tip penetrates fast and helps prevent walking, while the hex shank helps prevent slipping in a drill chuck. Use this reliable drill bit to drill holes into thin materials like stainless-steel, copper and more.

• Single-flute cutting edge for greater control through steps
• Hex shank prevents slipping in drill chuck
• 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