Spanner nut wrench. Used to remove and install upper driveshaft housing bearing retainer nut on sterndrives. Alpha series MC-1, MR,Alpha One and Alpha One Generation II. Bravo One. DOES NOT fit Bravo II, Bravo III, XR or TR units.
1/2" square socket drive to attach to breaker bar or torque wrench.
Replaces Mercury part #91-36235 Sierra 18-9803 and GLM 90100.
