On Sat, 13 Sep 2008 23:13:08 +0100, Harry Bloomfield wrote:

It is made from two bits of flat metal, one hooks onto the rim of the
tin, the other is the blade hinged onto the first. I have had it for
over twenty years on my car keys and it never fails to work.

As you say always works but you do have to be careful as fingers are
rather close to sharp bits of tin, especially when the lid is nearly off.

In todays nanny state I'm surprised you can still get them as there must
be figures showing that 2 people a year get a nasty cut (not requiring
stitches) when using one.

--
Cheers
Dave.