Z-Lion 1-1/2 Inch Dry/Wet Diamond Core Drill Bits/Hole Saws for Granite Concrete 1-1/2" Size:1-1/2" TPV Inner Tube: The TPV

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Z-Lion 1-1/2 Inch Dry/Wet Diamond Core Drill Bits/Hole Saws for Granite Concrete 1-1/2" Size:1-1/2" TPV Inner Tube: The TPVZ Lion 1 1 2 Inch Dry Wet Diamond Core Drill Bits Hole Saws for Granite Concrete The Diamond core dill bits is designed for drilling granite and concrete. 1. Start your hole diagonally, make a round trace and then hold drill straight,and drill your hole moving the drill in a slight circular motion. 2. Recommend to use water to cool dow. 3. Recomended speed 7700 RPM AOUT Z LION Xiamen ZL Diamond Technology Co., Ltd. is a professional diamond tool