This hard plate burr has especially deep grooves which allow removing more material more easily.
The special feature of this burr is that the shaft is 6 mm while the tip is 4 mm. This bit can be used with the standard 6 mm collet, but perforates more quickly and can also be used on protective plates covering the cylinder. Basically it combines the advantages of our 6 mm burrs with those of our 3 mm burrs.
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