4 mm Cobalt Drill Bit
Its precision-ground cutting edges ensure accurate hole positioning, smooth penetration, and clean results, even under high-temperature drilling conditions. Suitable for professional workshops, fabrication, and industrial applications.
The 4 mm Cobalt Drill Bit is engineered for high-performance drilling in stainless steel, hardened steel, and other tough metal materials. Made from high-speed steel with cobalt alloy, this drill bit provides excellent heat resistance, superior wear strength, and extended tool life during continuous use.
Item Attributes
| Length | 75 mm |
| Diameter | 4 mm |
| Flute | 43 mm |
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