Hooks are made with high-carbon steel and tempered with an electronic tempering process for extra-sharp hooks. Nickel Silver Black Finish. Per 25. Sizes: 8, 6, 4, 2, 1, 1/0, 2/0, 3/0, 4/0, 5/0, 6/0, 7/0, 8/0. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Hooks.