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Production video of small sand making machine, processing pebbles (river pebbles) quickly and well

May 11,2021 Jul 07, 2011 For drilling holes in small beach pebbles to use in jewelry, a 2.5mm diameter hollow coring bit works well. The bits they sell that are officially for Dremels are way too expensive, you can buy economically priced 2.5mm bits here on Amazon (affiliate link) or you can get higher end bits from Rio Grande Jewelry Supply.

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