The Opinel No.09 Oyster Knife is a folding oyster knife with a short, stout stainless blade that's sharp only at the tip, on a varnished padouk handle. It folds up to ride in a pocket or a boat bag on the way to the shore.

Only about the last 1.5 cm of the 6.5 cm (about 2-1/2 in) blade is sharpened, to cut the oyster's muscle; the rest is blunt, so you can use it to lever the shell open. The tip sits on the knife's center line for better control, and it opens both cupped and flat oysters. The padouk handle resists moisture and swells less than other woods. The Virobloc ring locks the blade open while you shuck and closed in your pocket.

Joseph Opinel began making his folding knives in Savoie, in the French Alps, in 1890, as a simple knife for working people. By 1909 he had registered the crowned hand as his trademark, and in 1955 Marcel Opinel invented the Virobloc safety ring. The Museum of Modern Art in New York has exhibited the Opinel as a design masterpiece, and the Victoria and Albert Museum in London chose it for an exhibit in 1985.