High quality combination tapping drill bits for drilling, tapping and deburring. Made out of high speed steel (HSS). A finely-tuned material elasticity provides for great durability. The very good centring properties, perfect chip removal and a low tilt risk ensure pleasant working. The hexagonal shaft ensures very good power transfer. Drive: ¼" hexagon, suitable for holders with take-up as per DIN ISO 1173-D 6.3.