Specification:Twin spiral, drilling efficiency, high precision.Long lasting life and features 4 cutting edges for hard masonry materials.Double pit double slot and round shank for efficient waste removal.Use by electric drills and drilling machines.Suitable for clinker, concrete, brick, natural or artificial stone.Type: Drill BitMaterial: AlloyQuantity: 1 PcShank Type: Round ShankLength: 110mm/4.33" (Approx.)Drill Diameter: 5mm/0.20", 6mm/0.24", 8mm/0.31", 10mm/0.39" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Drill Bit