Combination-Screwdriver with 1/4"-square
and 1/4"-bit-holder
For use with 1/4"-square sockets or 1/4"-hexagon standard bits (6.3mm). Choice between the two options simply by sliding the sleeve.
Proxxon 22281 Screwdriver With 1/4" Female Hex Drive & Magnetic Holder
Proxxon 22283 Combination bit/socket screwdriver 1/4"