Homemade “wonder pup”

[morsa]

Thank you, mklotz. You're right; I have this 3/8” socket and the driver set, and surely works, assuming the handle is aligned with the threaded rod, but I guess it would be useful only if the threaded rods were long enough.
For these short clamps, with the extended handle, you can easily turn both the screw as the handle with your fingers until the head reaches the workpiece, then with the leverage given by the bent handle, you can apply the desired clamping pressure.