I have two sets of the Turnigy long shafts in SAE and Metric. Less than $24.00 shipped for 8 wrenches and so far they are very nice. Very tight fit in the screw.
Also have the DuraTrax sets that look like the Dynamite brand wrench. I've had them a long time and they have worked well. The rubberized handles have torn but the tips are still OK.