The CorePlus Diamond Dry Core Drill Bit delivers a smooth drilling experience. Its 8mm diamond segments feature a high concentration of premium-grade diamond in the bond, utilising leading edge diamond/metal bonding, metallurgy, for long-lasting core life. A ribbed core body, and V-groove segments, enable the fast clearing of debris, allowing for a continuous fast cutting action, while the aerated core design enhances cooling, and extends core life. 1/2in BSP threaded compatible with standard core drilling machines and accessories. Please Note: 22mm and 28mm have a 10mm Hex Shank and do not require an arbor accessory.Select Option 102mm107mm117mm127mm152mm157mm162mm182mm22mm28mm32mm38mm48mm52mm65mm78mm91mmSet, 11 PieceSet, 7 Piece Add to Basket Quantity