These high speed individual ground drill bits are manufactured from ground solid bars and are intended for general workshop and production use. With a good chip clearance and producing a high quality clean cut, especially in the more difficult materials.
These drill bits are also ideal for drilling the pen blanks, including wooden and the acrylic pen turning blanks to take the required size brass tubing
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Proxxon MOS Carver & Flexcut RG100 Power Carving Deluxe Set (14 Piece) Package
Thanks for your detailed explanation on the use of the Sandmaster, I have added your website to my favourites list. A much better service than my local tool shop - Paul Jones