Hudy Universal Flywheel Puller. The HUDY Flywheel Puller may be used for the easy and safe removal of nitro engine flywheels. Without a proper tool such as the HUDY Flywheel Puller, it may be difficult to remove an engine flywheel without damaging the flywheel and/or marring the engine crankcase. The CNC-machined flywheel puller body is made from hard-anodized aluminum additionally black-anodized with laser engraving. Fits flywheels used in RC competition engines (.12, .21, .25). The central fine-pitch steel screw with handle makes flywheel removal easy without little effort.