Inboard Prop Nut Repair set fits for 1" to 1 1/8" shaft sizes. A must have tools set for you to replace new acme propeller. Some premium parts you need to ensure the connection between the propeller and the prop shaft. Made of premium steel these items are not easy to get rusty , not easy to wear and not out of shape for a long time. 【Package Including】 This set consists of several parts including 1 cotter pin,1 Nylon Prop nut and 1 key. This Repair set fits for for 1"" & 1-1/8"" Propeller