Application: For 1 / 4in DIN 3126 C 6, 3 und E 6, 3 (ISO 1173) hexagon insert bits & Wera Series 1 & 4 Design: Rapidaptor easy in, easy out, rapid spin, chuck all, & single hand technology, with strong permanent magnet Capacity 1 / 4in Shank 1 / 4in 75mm Length.