Weikeya Diamond Drilling Bit, Diamond Wet Coring Bit 4in Diameter Diamond Wall Hole Opener Labor Saving Alloy Steel Diamond Hole Saw Drill Bit 5/8‑11 Thread for Concrete Brick Marble
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- Reasonable Design This diamond hole opener features chip hole, highly regular saw teeth and concentric axes to ensure efficient and fast hole opening.
- Easy Start drilling from a vertical position and then drill deeper, easy and labor saving, widely used in air conditioning installation, pipe drilling, etc.
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