I bought a very little used howse shredder off ebay for $350 the other day for "exploring" dubious areas. The quick attach yoke on the
pto was very rusted, so I could not hook it up to the tractor. I scrubbed off the rust on the splines, but the ball bearings were rusted in place. So, I took the quick attach collar apart, polished the ball bearings, and tried to put it back together. The collar is held on by a rectangle wire formed snap ring without holes. Pretty heavy duty, and much harder to put on than to take off. Ended up breaking my small pair of snap ring pliers after a couple of hours of fighting, cussing and yelling at the stupid thing.
The next day I bought a set of large snap ring pliers for $12 at HF. These are pretty dang big, and they lock shut/open with a racheting system. Pretty neat.
The snap ring was on the
pto shaft 45 seconds after I opened the package.
Of course, this is something I'll probably only use a few times a year.