I bought a set of four F-style clamps a decade ago for probably $5 at one of those tool ‘auctions’ of new stuff, the precursor to Harbor Freight (perhaps). Anyway, over the years they’ve lost their ‘grab’ and I can’t tighten them with any certainty, with any significant pressure. But I’ve held off throwing them away.
Today I wanted to clamp through a doghole in my benchtop and reached for one of these bad boys. Ground off the stud at the end so the turnscrew piece would come off, and tried the clamp. Rats, no hold.
I pulled the two flat pieces of sheet stock out of the ‘head’ and took a file to the holes in each, to put a square edge back on them. Well, it worked! With the clamp together, through the bench, it held like crazy.
Now to take apart the other three!
-- Don't anthropomorphize your handplanes. They hate it when you do that. -- OldTools Archive