Bosch ASPMT08 1/2-Inch by 13-Inch Spur Auger BitTechnical DetailsSolid cneter flute provides added rigidity.Low-friction flute with black oxide coating reduces chip clogging.Self-feeding screw point for soft and hard woods.Universal power groove hex shank for power drill or impact driverFull length heat treatment for heavy duty applicationsProduct DescriptionFrom the ManufacturerBosch Type I spur augers feature a sharpened spur cutting edge designed for fast, clean holes.