MMR Modular Crankshaft Turning Socket 4.6 / 5.4 / 5.0 Coyote TiVCT Required for engine building to turn crankshaft without damaging the crank snout or threads. Attaches to any 1/2 drive socket wrench. Fits all Ford Modular V8 4.6L, 5.4L , 6.8L V10 & 5.0L / 5.2L V8 Coyote Engines. This is a precision tool and fits the crankshaft perfectly. Large Burrs/Grooves from the harmonic balancer on used crankshafts may need to be removed / sanded slightly to provide a smooth and easy sliding fit. ABSOLUTELY NO RETURNS ON ANY TOOLS.