These "spinner" drivers from Beta Tools feature sliding T-handles that can be removed for compact storage. They also let you turn a T-handle into an L-handle for maximum torque, then back to a T-handle for quick fastener spinning. All three ends (extended end plus both ends of the handle) have the same size male hex "Allen" drive.
This 6-wrench kit contains the following SAE (inch) sizes:
5/32", 3/16", 7/32", 1/4", 5/16", 3/8"