The Drotto Replacement jaw is built with a heavy gauge steel and cut with laser precision. There are 2 versions of the Jaws. One is a standard Jaw that replaces the jaw of a Small or Large Model. The other version is a Ranger Stratos only Jaw. This jaw has a slight curve that replaces the jaw on the Ranger/ Stratos only model. Technically either works on all models, But if you own a Ranger boat you would be best with a replacement Ranger model Jaw.