Review on π Premium Diamond Drill Bit Cylindrical Burr Kit - Perfect for Jewelry, Beach Glass, Shells, Gemstones, Lapidary - Aiskaer 60 Pcs Set by Zachary Cha
Used them to poke a hole through a very hard one.
Used this to drill a hole in a very hard piece of rock to be used for hanging. It took three drill bits to complete this job because the diamond grit at the end of the drill bit was worn out, but I think that's normal with this type of drill bit. You must work slowly and keep the work moist.
- New
- Broadly ok but...
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