Diamond core drill Diameter: 2"-14", width: 3.5mm or 4.0mm, height: ... drill 1.Wet cut drilling reinforced commcrete,block,glass,ceramics.2.Make hole rule,smooth,high-efficiency,lower strength and insuring engineering ... , green concrete, asphalt and abrasive materials.Machinery:Core drill machine and hand drill, driven by hydraulic power station or electric motor.dia ...