A. Compatibility: It is used for removing the built - in propellers of wakeboard/surfing boats. It is suitable for shafts with a diameter ranging from 3/4 inches to 1 1/8 inches, and works well for competition boats and other built - in boats with a maximum shaft diameter of 1 1/8 inches. There should be at least a 1/4 - inch gap between the propeller hub and the strut. (Note: The shaft end must have a dent when in use.) B. Replacement function: It can replace the PULR - PT parts in terms of function and performance. C. Design features: The opening size ranges from a maximum of 4.5 inches to 3.25 inches. These tools are equipped with fine - thread screws that can generate strong pulling force. They are designed to remove two - blade, three - blade, and four - blade propellers on built - in shafts. D. Function and use: With this propeller remover, stubborn propellers can be removed. You can enjoy your time on the water without having to lie on the ground struggling with a stuck propeller. E. Materials: It is made of hot metal and electroplated to prevent rust, ensuring durability, strength, and performance. F. Color: Black G. Material: Metal H. Package contents: 1 built - in propeller remover. The package only includes the above - mentioned items, and other items are not included. Note: Light and different displays may cause the color of the item to vary slightly from the actual product. A measurement error of plus or minus 1 - 3 centimeters is allowed.