7-Piece tapping drill bit set in a stable plastic box for the cutting of metric threads. The hexagonal bit shaft ensures very good power transfer. The finely-tuned material elasticity provides for great durability. Perfect chip removal and a low tilt Risk. The Rapidaptor ensures rapid bit change without any extra tools. ¼” hexagon, suitable for holders as per.Rapidaptor universal holder, non-magnetic, and tapping drill bits with 1/4" Drive.In practical and robust plastic box