Diamond core drill Color :Blue Best quality Best price Long using life Diamond core drill Diameter Arbor ConnectingSegmentHeightxSegmentQTYOverall LengthMetric(mm) Metric(mm)Metric(mm)65M168mmx410068M168mmx410082M168mmx510085M168mmx5100 1.Wet cut drilling reinforced commcrete ,block , glass , ceramics .2.Make hole rule , smooth, high-effciency , lower strength and unsuring engineering quality .3. ...