... Item No:ST0014-A3 2.Diamond Sintered Core Bits 1/2" gas 3.material:diamond 4.sintered We have the following workshops: 1 ... , diamond resin grinding wheels, etc. 2. Workshop 2: tungsten carbide burrs: inch size and metric size, all standard rotary burrs 3. Workshop ... chemical and aerospace fields Product: We are one of the most professional companies exporting construction tools and machines, including ...