Koike Hooks. Koike: Circle Straight Eye Hook: 1/0, 2/0, 3/0, 4/0, 5/0, 8/0, 10/0. Koike: Circle Turned Up Eye Hook: 1/0, 2/0, 3/0, 4/0, 5/0. Depending on the supplier, batch or product, the product colour may range from almost bright nickel to a dull black colour.
