Application:Suitable for 1/4" DIN ISO 1173-C 6.3 and E 6.3 hexagon socket insert bits and Wera Series 1 and 4 Design:Attachment, telescopic, Rapidaptor rapid-in, rapid-out, rapid-spin, chuck-all and single-hand technology; "Take it easy" tool finder: Output colour coding and large stamp to enable the desired bit to be easily located. Handle:Kraftform with non-roll feature, multi-component, integrated magazine