ApplicationUsed to remove and install driveshaft housing (upper) bearing retainer nut Bearing carrier fit： for all compatible for mercruiser Alpha one, Pre Alpha, Generation 2, Bravo One, Trs outdrives . Compatible for Mercury / Mariner outboards 150HP and up. for 1981 and earlier R, MR. for 1983-1990 Alpha Generation I. for Alpha Generation II (all years). for MC1 (all years). for Bravo (all years). Compatible for Blackhawk (all years). Note: Not fits Bravo 2, 3, XR, or TR. Bearing Spanner Tool fit： for 1981 and earlier R, MR for 1983-1990 Alpha Generation I for Alpha Generation II (all years) for MC1 (all years) for Bravo (all years) Compatible for Blackhawk (all years)FeatureColor: Gray Warranty: one year for any manufacturing defect Replaces part number: 91-61069. Package Includes: 1x Bearing Carrier tool 1 x Drive Spanner (As picture shown) * 100% brand new in box * Suitable for 4 3/8\" retainer nut. * Type:Bearing carrier tool,Bearing Spanner tool * Both have a nice Black Oxide finish on them. * Bearing Spanner Equipped with Reinforced 1/2\" drive square for torque wrench or breaker bar. * Professional Installer is Highly Recommended (No Instruction Included) * Alignment Highly Recommended After InstallNote* Please feel free to contact us for whatever we can help. * Instruction is not included. Professional installation is highly recommended.