General description This 11 piece CorePlus Diamond Dry Core Drill Bit Set is supplied in a sturdy aluminium storage case. It includes 5 Diamond Dry Core Drill Bits in sizes 38mm, 52mm, 65mm, 117mm, and 127mm, along with 6 accessories. The CorePlus Diamond Dry Core Drill Bit is designed to deliver a smooth drilling experience. Technical specifications Diamond segment thickness: 8mm Sizes of drill bits: 38mm, 52mm, 65mm, 117mm, 127mm Thread type: 1/2in BSP Hex shank for 22mm and 28mm bits: 10mm Compatibility and accessories Compatible with standard core drilling machines and accessories 22mm and 28mm bits do not require an arbor accessory Usage The CorePlus Diamond Dry Core Drill Bit is ideal for achieving a smooth drilling experience, with features that allow for fast clearing of debris and continuous cutting action. The aerated core design enhances cooling and extends the life of the core.