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6pcs in total,4pcs(20/25/35/50mm) Diamond drill bits,1pc 20mm Granite Finger Milling Bit and 1pc 2" Diamond Beveling Chamfer Bits.
The diamond finger bit is desinged to shape, enlarge and round bevel existing holes in Porcelain, Hard Ceramic, Granite and Marble.
The Beveling Chamfer Bit is a cost-saving tool because you can create many different hole sizes without buying several different core bits.
All bits are suitable for 5/8"-11 thread angle grinder; Recommended speed: 6000RPM; Max Speed: 11000RPM
If you fit them on hand drill or other machine, you need an adapter such as Hex Shank or SDS Plus Shank.