Used these all over Southern France and Paris, but had never seen them in U.S. We scoured the kitchenware shops in Paris, finally buying the final four available in a shop near E. Dehillerin.
They came with the cork enpointe. (O.K., I know that's not the right word for this usage, but I can't resist.)
Great for safety in the kitchen drawer scramble
Found these online:
Or, this crazy contraption that looks not only worthless, but dangerous, too.