| 1.Replaceable cutter blades and pilot drill. Economical, replace the blades or drill, not the complete circle cutter. |
| 2.Precision sharpened cutter blades for smooth, accurate cuts. |
| 3.To extend cutting depth to 50mm, stop boring when the pilot drill break through. Then, using the drill hole as a guide, bore the hole from the other side. |
| 4.Tighten tightly screws securely before boring. |
| 5.Hold the power-drill firmly to resist the clockwise twisting motion when the cutter begins to bore. |
| 6.10mm hexagonal shank. |
| 7.Scale reads for diameter. |
| 8.Measurement in millimeter & inch. |
