Technical Specifications

• Material: M2 High-Speed Steel (HSS) with corrosion-resistant bright finish

• Shank: 1/4" Hex (impact driver compatible)

• Step Count: 12 graduated sizes

• Step Range: 3/16" → 7/8" diameter (4.8mm → 22.2mm)

• Flute Design: Fast-spiral for efficient chip removal

• Point Type: Self-starting split point (no pilot hole required)

Precision Step Sizes

1. 3/16" (4.8mm)

2. 1/4" (6.4mm)

3. 5/16" (7.9mm)

4. 3/8" (9.5mm)

5. 7/16" (11.1mm)

6. 1/2" (12.7mm)

7. 9/16" (14.3mm)

8. 5/8" (15.9mm)

9. 11/16" (17.5mm)

10. 3/4" (19.1mm)

11. 13/16" (20.6mm)

12. 7/8" (22.2mm)

Key Features

✔ Impact-Ready Design: 1/4" hex shank withstands hammer drill use
✔ Smart Progression: 12 essential sizes in one bit (3/16"-7/8")
✔ Anti-Jam Technology: Fast-spiral flutes prevent chip clogging
✔ Precision Control: Count steps or use washer as depth stop
✔ Professional Protection: Includes durable storage case

Material Compatibility

• Metals (≤1/8" thick):
  ✓ Carbon steel & stainless (including sink-grade)
  ✓ Aluminum, copper, brass

• Non-Metals:
  ✓ Plastic laminates
  ✓ Fiberglass composites

Professional Applications

• Electrical Work: Adjusting knockout sizes in panels/J-boxes

• Metal Fabrication: Precision holes in sheet metal

• HVAC: Modifying ductwork and vents

• Automotive: Body repair and custom installations

• Construction: Metal stud framing modifications

Optimal Usage

• Speed: 800-2,000 RPM (reduce for harder materials)

• Lubrication: Use cutting oil for stainless steel

• Technique:

  • Apply consistent downward pressure

  • Clear chips regularly

  • Stop drilling when desired size is reached