Having the right tools for the job makes for quick reliable work. An indispensable tool to quickly and safely remove propellers. Simply back off the propeller shaft nut a few turns, slip the puller over the wheel, hook the square head screws into their sockets and tighten evenly until the propeller is loose. This propeller puller exerts its pulling force against the backed off nut and when evenly tightened will not bond or damage the shaft. With this puller, propellers can be removed while the boat is in the water.