An incredibly sharp Gamakatsu hook will spell the difference between success and failure. The sticky sharpness of Gamakatsu hooks is the result of a patented mechanical needle-honing process developed to ensure anglers get the sharpest hooks possible. High-carbon steel construction ensures superior strength and durability. Imported. Per 4. Sizes: 3/0, 4/0, 5/0. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Soft Plastics.