FITMENT This bearing puller and installer set could be used on Mercruiser Alpha, Alpha 1, MR, Bravo, OMC Cobra, Volvo. FUNCTION This tool set can easily remove and install the gimbal bearings on bell housings. It can also be used to check engine coupler alignment with the gimbal bearing and drive. EASY TO USE After assembling the set and apply on the specific place of gimbal bearing, turn the end of the tool with a wrench, you could easily pull the bearing out. The tool set includes an eyebolt which gives you the option of hanging the tool. HIGH QUALITY .