1PC Adapter for core drill bit,Diamond Grinding Wheel..(Change Connection) This Adapter could change 5/8 Inch-11 Thread to 3/8-Inch Hexagon Shank Can fit 5/8-Inch-11 tools to your 3/8-Inch Hex Shank machine through this Adapter, for exmaple fit the M14 core bits to your Electric Drill with 3/8-Inch Hex Shank High quality steel provides longer working life The adapter can be reused, lower cost, value for money This Adapter could change 5/8 Inch-11 Thread to 3/8-Inch Hexagon Shank,
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