Product Name: Diamond Core Drill Bit Sets-Drill Bit for Granite Countertops Top Processing Model NO.: drill bit for granite countertops Usage: Masonry Drilling, Drilling Material: Diamond Type: Core Drill Bit Kind: Diamond Drill Manufacturing Arts: Sinter Product Name: Plane Bits Segment Dimension(mm): 10 Usable Length(mm): 40 Suggested R. P. M: 4100 Quality: High Performance Application: Granite, Basalt, Sandstone, Marble Ect. Drilling Life: Long Trademark: wanlong Transport Package: According to Customer Request Specification: Dimension: 10mm diamond drilling tools Origin: Quanzhou Product Description DIAMOND DRILLING TOOLSCHARACTERISTICS OF PRODUCTS1. High efficiency, no-chipping, long life.2. Selectable adaptor sizes: Dia6/8/10mm shank, M14 thread, 5/8"-11 thread or Gas 1/2" etc.Product nameDimension(mm)Usable Length(mm)SuggestedR. P. MPlane Bits6.0-6.5404500Plane Bits8.0-9.0404300Plane Bits10404100Plane Bits12-16403500-4000Segment Bits1840-1003500-4000Segment Bits19-3240-1003000-3500Segment Bits35-5040-1002500-2800Segment Bits51-10040-1001500-2500Segment Bits100-15040-1001500Crown Bits10-20473500-4300Crown Bits20-3547-1003000-3500Crown Bits35-5047-1002500-2800Crown Bits50-6047-1002000-2500