I have a couple of favorite corkscrews. At home it's my Rabbit-wannabe, purchased for ~$10 at BB&B. It works like a charm. For portability I take my 3-piece Screwpull. But there have been several times in restaurants when my wine has been uncorked with a corkscrew that looks like your typical "waiter's friend" except that it's got a hinged lever that provides two tiers of leverage when the cork is being removed. In other words, this hinge eliminates the need to lift the cork out partway, screw the worm further in, and remove the cork the rest of the way, as is sometimes necessary with a waiter's friend. But, whenever I've asked where I can get one of these for myself, I've always been told that they're promotional items, provided to the restaurant by their wine distributor.
So -- who makes these, and where can I buy one? Better still, how can I finagle a promotional freebie? BTW, I once thought I HAD found it -- at Zabars in NYC. It had a hinge and LOOKED like the ones I'd seen in restaurants. So I bought it, but when I got it home I found it didn't work at all like what I'd expected.