Features and specifications: This revolutionary bit holder is truly unique, Wera introduces this next generation of quick release bit-holders, combining five significant product advantages: rapid-in + self lock, rapid-out, rapid-spin, chuck-all 1/4″ bits, single-hand operation A screwdriver bit can be simply put into the holder, it then activates the automatic self locking bit system, its then ready to use To remove the screwdriver bit, you simply push the outer sleeve forward which releases the spring-loaded mechanism, easy bit release The outer sleeve is free-spinning which offers the user complete control and can be easily stabilized when screw driving with power tools. The Rapidaptor bit holder can take all 1/4″ hexagon bits The holder has a Torsion zone, which helps to reduce the impact of damaging load peaks as well It has a inside magnet for immediate grip Application: For 1/4″ hexagon insert bits, DIN 3126-C + E 6,3 Drive: 1/4″ -hexagon with quick-release bit holder