Step Drill Bit for Metal 1PC, 4-20mm M35 Spiral Flute Unibit Step Drill Bit, 1/4
USD 53.20 USD
Specifications
| Brand | Unbranded |
Includes 4 mm, 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm. 【AlTiN Coating】 Step bits coated with aluminum titanium nitride, rated at 89HRC for exceptional hardness and thermal properties. How do I properly use this step drill bit?.
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