Tapered Drill Bit Chamfer Cutter Countersink Diamond Grinding Hole Tool 30Mm Dia 90 Degree 8Mm Shank for Ceramic Glass Marble Wood. Albedel Tapered Drill Bit Chamfer Cutter Countersink Diamond Grinding Hole Tool 30mm Dia 90 Degree 8mm Shank For Ceramic Glass Marble Wood Package Contents:1Pcs Diamond Chamfer Drill Bits. Chamfer Drill Bits Size:50x30mm/1., 96x1., 18Inch(Length x Diameter),Handle Diameter:6mm/0., 23Inch,Angle:90 degrees. 3) It's easy to install and operate with its professional design and sturdy Structure. 6mm Shank Diamond Bit Tapered Drill Bit Chamfer Cutter Countersink Diamond Grinding Hole Tool 30mm Dia 90 Degree 8mm Shank For Ceramic Glass Marble Wood Diamond Grinding Hole Bit High performance in cutting glass, slate, tile, porcelain etc. Tiny diamond particles coated tip offers sharp cutting. To prolong its using life... The chamfer drill bits is made of premium metal with diamond coated,sharp and wear-resistant,precise Angle,and durable. Description: 1) This Tapered Drill Bit is good Tool to cut a chamfer or Deburring. Albedel Tapered Drill Bit Chamfer Cutter Countersink Diamond Grinding Hole Tool 30mm Dia 90 Degree 8mm Shank For Ceramic Glass Marble Wood This chamfer drill bits great be used for Glass,Jadeware,Marble,Ceramic,Tile,Wood,etc.