I had some reservations buying this puller after reading the reviews. But all worng. This tool is made for Mercruiser Alpha 1 gimbal bearing. The atrachement plate is perfect and wrap around the oil check valve perfectly. Once installed and thru the bearing, lightly tap the T handle so it sits in place and start wrenching. Took out my stuborn gimbal easy. Although you need some elbow grease on that wrench. I would give it 6 stars.