Detailed Product Description Laser Weld Diamond Core BitApplication: non-reinforced concrete, masonry, light-weight ... 0x7/9mmCB152D6"/152mm324x4.0x7/9mmNOTE: CB70DS24X3.5X7S--diamond Core drill Bit, dia 70mm, Dry cut, Segment 24x3.5x7mm, Super quality grade. ... 152mm324x4.0x7/9mmNOTE: CBT70DS24X3.5X7S--diamond Core drill Bit with Turbo segmentts, dia 70mm, Dry cut, Segment 24x3.5x7mm, Super quality ...