Engine Crankshaft Turning Socket Tool 1983-pontiac-firebird-esi2278290 BMR Suspension designed the MM461

BMR Suspension designed the MM461 to be the perfect (100% bolt-in) motor mount for any power level or application (street performance

Perfect for full-size trucks and RV's used often for towing and hauling

The Roto-Joint is adjustable and fully rebuildable for long-lasting performance

It comes with 8 skewed blades

Engine Crankshaft Turning Socket Tool 1983-pontiac-firebird-esi2278290 BMR Suspension designed the MM4611. 225in ID with 3 16in keyway. Engine work requires repeated crankshaft rotation. This non marring, aluminum tool rotates the crankshaft the proper way, when the balancer is off. Making sure to have the proper size, position this socket over the end of the crankshaft, so it can be turned using a 1 2in breaker bar or drive ratchet.