I still have some of the clutch head screw drivers I bought 50 years ago. They look like the ones in the ad. I keep them in my tool box at home because they can't use them at the shop any way. If remove something like a rear fender on a 50's, I try to save the bolts. Before I ever start, I spray some P oil on the threads usually a day in advance. Before I start twisting, I rattle them a little with a needle scaler. This cleans out the hole for the bit and rattles the rust out of the threads. I'm not into show vehicles, but they just don't look right with hex cap screws where clutch head belong.
