specially shaped chip channel, replaceable threaded tip in HSS, 2 main cutting edges carbide-tipped, with protruding cutting edges and cylindrical shank with 3 clamping surfaces, CNC diamond grinding, for producing accurately fitting holes in most hardwoods, for exotic hardwoods such as bongossi, we recommend auger bits with bottom blade from the 1493 series, also suitable for end grain drilling in hardwood with a powerful carpentry machine, incredibly long service life in hardwood, for end grain drilling (ø 20 mm) in hardwood, the machine should have a torque of min. 50 Nm torque