
This is the twin lever capper I generally use. It's fairly old now, perhaps as much as twenty-five years. It's even possible that I bought it from Boots. The mechanism looks different from the one previously posted. Perhaps that might have an effect on the ease of use?

The result:

I have a couple of bench cappers, including this one:

and a cap put on using this at its lowest possible setting:

You can see that it hasn't crimped the cap closed anywhere near as well, to the point where, unlike the first capper, the cap can actually be removed without creasing it. In fact I reckon I could probably re-use the one on the left:

I'm not at all convinced the cap is adequately sealed. My other, more expensive, bench capper, bought because I wasn't happy with the one above, has exactly the same problem.
I'm all ears if there is a way to make them work properly (to my way of thinking, at least).
James