The Wera 05051205001 812/1 Bit-Holding Screwdriver with Strong Permanent Magnet is a high quality bit holder with strong, permanent magnet that holds the bits absolutely securely. Kraftform handle for pleasant, ergonomic working. Kraftform Plus: Hard gripping zones for high working speeds whereas soft zones ensure high torque transfer. Suitable for bits with 1/4'' hexagon head drive as per DIN ISO 1173-C 6.3.