220 x 400 mm Dry and Wet Diamond Core Drill Bit. Our high quality 220×400 mm drill bit is perfect for use with electric core drills for drilling on granite, hard stone, concrete, reinforced concrete, and other hard surfaces. Its durable construction will ensure smooth operation of the drills. We also provide bits of other sizes to meet different drilling needs. Size: 220 mm X 400 mm Segment Height: 7 mm Threaded connection: 1 1/4. Size: 220 mm X 400 mm. Segment Height: 7 mm. Threaded connection: 1 1/4. Sorry, our items are NOT available for pick-up. No additional information at this time. You might also like. VidaXL Console Table 120x32x80 cm Solid Rough Wood Acacia. VidaXL Sideboard High Gloss White 60x35x70 cm Engineered Wood. VidaXL Side Cabinet 60x36x65 cm Solid Wood Pine. Curver Pedal Bin Deco D-Shape 40L Silver.