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Lapidary Drill Bit - 1mm Diamond Coated Lapidary Drill Bits, Solid Bits Needle, Agate Drill Bit for Jewelry Agate 20pcs/pack
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★Lapidary drill bits made from diamond powder, high-quality, precise and durable to use.
★Idea for drill holes on the jewelry, ceramic, jade, agate, glass, amber and semiconductor materials etc.
★The higher speed of drilling machine, the better effect of drilling bits.
★The speed of drilling machine need to be reached 2000 RPM when you use our drill bits to drill holes.please use cold water during the drilling hole operation
★If you use the drill bit for many times, it will not be very sharp than the first time using.You could cut a little the top of it with plier, it will become sharp again.
Lapidary Drill Bit - 1mm Diamond Coated Lapidary Drill Bits, Solid Bits Needle, Agate Drill Bit for Jewelry Agate 20pcs/pack Review