The Mustad Barbless Demon Circle Inline Hook is a true circle hook featuring 4X extra heavy wire. The 4X extra heavy wire hook will bring the toughest of fish onto the boat. Setting the hook is more of a firm tightening of the line, than an actual strike. This is the ultimate Catch&Release hook. Use it to fish for a whole range of fresh and saltwater species. Coated with Mustad?s own Black Nickel finish, which are 4 times as rust resistant as traditional Black Nickel. Chemically sharpened high carbon steel.