Kraftform Kompakt Micro Set for precision mechanical applications; suitable for the take-up of bits with 4 mm halfmoon drive (Wera series 9) and bits with 4 mm HIOS drive (Wera series 21); handle/interchangeable blade system for rapid blade change; Kaftform Micro handle with twist cap and free-turning zone for rapid twisting, making any time-consuming repositioning of the fingers unnecessary; power zone with integrated soft zones for the transfer of higher tightening and loosening torque; precision zone directly above the blade for the right angle for adjustment work; comes with 10 bits for manual as well as power tool operations; rapid fixing of the bit: just push the bit into the insert for automatic locking and a secure fit.To change the bit, simply push the sleeve forward and remove; free-turning sleeve for simple guidance of the tool during the screwdriving process