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Diamond electroplated high speed twist drills have a medium/fine grit (120-140grit) and are great for drilling holes in stones, ceramics, glass, and other hard non-metallic materials. The drill size indicated is before the diamond coating. Remember to always use water or a diamond lubricant when using diamond instruments of any kind.
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🇺🇸 Ship from USA · On Agora since 2026
$1.75