Features:1Application: Fits all for Mercruiserone One, for One Gen Two, Bravo One, TRS outdrives, will also fit for Mariner outboards 150HP and up, will fit the 4 3/8 inch retainer nut and not fit for Bravo 2, 3, XR, or TR. 2Function: Used to remove and install driveshaft housing (upper) bearing retainer nut (By U joint shaft) on 1 (1982 and earlier), R, MR, Gen 1 (1983 1990), Generation ll (all), MC1, and all for Bravo units. 3Replacement: Replaces spanner nut wrench 91 17256, 91 36235, 18 9803, 90100, replaces bearing carrier retaining nut wrench 91 61069, 91 61069T, 18 9858. 4Material: The drive spanner bearing carrier retainer wrench tool is constructed with steel, durable and strong enough, black oxide finish which coated resisting corrosion and rust. 5Good Workmanship: Bearing retainer spanner wrench carrier retainer wrench tool, with exquisite workmanship, beautiful appearance, portable size, providing you great using experience.Specification:Item Type:DriveSpannerBearingCarrierRetainerWrenchToolProduct Material: SteelWeight: Approx. 2742g / 6.0lbApplication:FitsallforMercruiser One, OneGenTwo,BravoOne,TRSoutdrives,willalsofit forMarineroutboards150HPandup,willfitthe43/8inchretainernutandnotfitforBravo2,3,XR,orTRPackage List:1 x Bearing Retainer Spanner Wrench 1 x Carrier Retainer Wrench Tool