They also don't really work all that much better than channel locks and a screw driver.
Changed and packed wheel bearings on a boat trailor for a buddy a while back (they still do it the old fashioned way) and decided to try out the nifty cap removal tool, now that I finally own one, after 30 years of doing it the hard way.
Tugged, wiggled, pried, swore*. Cap wouldn't budge. Gave up, used the 8 oz brass hammer and channel locks....sigh
*No, I have never had swearing at it make something work, oddly, but it seems to make me happier about it ;P