Technical Specifications

• Construction: M2 High-Speed Steel (HSS) with bright anti-corrosion finish

• Shank: 1/4" Hex (impact-ready for drills/drivers)

• Step Count: 12 graduated sizes

• Step Range: 7/16" → 1-1/8" diameter

• Flute Design: Fast-spiral for rapid chip ejection

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

Step Size Progression

1. 7/16" (11.1mm)

2. 1/2" (12.7mm)

3. 9/16" (14.3mm)

4. 5/8" (15.9mm)

5. 11/16" (17.5mm)

6. 3/4" (19.1mm)

7. 13/16" (20.6mm)

8. 7/8" (22.2mm)

9. 15/16" (23.8mm)

10. 1" (25.4mm)

11. 1-1/16" (27.0mm)

12. 1-1/8" (28.6mm)

Key Features

✔ Impact-Ready: 1/4" hex shank works with hammer drills/drivers
✔ Fast Metal Removal: Optimized flute design prevents jamming
✔ Precision Depth Control: Use washer as stop or count steps
✔ No Walk Technology: Self-centering tip starts cleanly
✔ Included: Protective storage case

Material Compatibility

• Metals (≤1/8" thick):
  ✓ Steel/stainless (sink-grade)
  ✓ Aluminum/copper/brass

• Non-Metals:
  ✓ Plastic laminates
  ✓ Fiberglass/PVC

Professional Applications

• Electrical: Enlarging panel knockouts, switch boxes

• HVAC: Adjusting duct openings

• Automotive: Body repair & custom fabrication

• Construction: Metal stud modifications

• Plumbing: Appliance installs

Usage Recommendations

• Speed: 1,000-2,500 RPM (slower for harder metals)

• Lubrication: Cutting oil recommended for stainless steel

• Technique: Firm, steady pressure - avoid side-loading