Диаметр 14 мм Профессиональный алмаз вакуумной пайки бурения биты для камня, M14 подключением сухой сверла

Wax inside to cool the drill when working

Feature:1.Fast and Smooth drilling

2.Long lifetime

3.Less Chipping

4.Minimizing any breakage

5.Less loss of material

6.Less heat generation

7.Better finish quality

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