100pcs Ultralong Diamond Grinding Bits shank 2.3mm Drilling Hole Bits Small Drills 0.8mm-2.5mm Stone Jade Drilling Bits Drills

100pcs Ultralong Diamond Grinding Bits shank 2.3mm Drilling Hole Bits Small Drills 0.8mm-2.5mm Stone Jade Drilling Bits Drills

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