Somebody come here with a hex shank and put this conduit back together!

Some companies now offer a modernized version that uses standard 1/4-inch hex shank power tool bits.

Aircraft alloy hex shank allows wrench application for more torch in tight spots.

A hex shank can be grasped by a 3-jaw drill chuck or held in a chuck specifically for hex shanks.

The flats of a hex shank can either be machined on a round shank, as in the photograph, or be the natural flats of hex bar stock.

Quarter-inch hex shanks are common for machine screwdriver bits and have spread from that application to be used for drill bits that are compatible with screwdriver machinery.