Bosch 2608595493 Selfcut Speed Flat Drill Bit, Hex Shank, 24mm x 152mm

Flatcutter Self Cut Speed​ Excellent performance and drilling accuracy ratio
Up to four times less expensive than the auger bit
Clean holes: new cutting geometry for safe and accurate drilling. Innovative self-closing thread tip for fast and accurate drilling with little effort.
Pulls itself through to breakthrough, even in hardwood.
Suitable for softwood and hardwood as well as lightweight construction materials such as plasterboard.
Drills three times faster than standard flat bit.
Patent pending, self retracting thread crest and cutting geometry.
Manufactured to own factory standard made of specially tempered steel.
Precision ground tip and cutting edges for dimensionally accurate holes.