Application: Suitable for bits with 1/4" external hexagon drive as per DIN ISO 1173-C 6.3 and E 6.3 and Wera connection series 1 and 4 Design: 300 mm long rigid blade; with compact stainless steel holder and strong permanent magnet. Secure bitholding function thanks to locking mechanism. Handle: Kraftform with anti-roll protection, multi-component, integrated bit magazine | Wera 7-Piece Kraftform Kompakt 27 Xl Universal Interchangeable Extension Screwdriver Set