A sommelier knife, waiter's friend or wine key is a corkscrew in a folding body similar to a pocket knife. It was conceived by the German Karl Wienke in 1882 and patented in Germany, England, and America. An arm extends to brace against the lip of the bottle for leverage when removing the cork.

A waiters friend with rubber handle for a more ergonomic grip.

The ultimate bar tender or waiters friend. Flat bottle opener stainless steel with 2 size openers.

Chrome corkscrew wing type for removing corks from wine bottles. 

Handy wall mounted bottle opener for fast food shops and cafe's.