Unused, unopened product. These are worm hooks with a mass-bari (weedless) shape. Size #4 is the second smallest size, a slightly smaller hook, with 12 hooks per package. I use these for fly tying for trout, bass, and bluegill, but they are originally worm hooks. These are durable hooks that won't break or bend even when fighting large fish. Bead heads can also be used normally. The manufacturer's suggested retail price is 550 yen + consumption tax per package.