Dennis Stubblefield Sales Flywheel Puller - 30 x 1.5 RH MP#8 All pullers made to precise standards equal to factory original tools or better. Each tool and bolts are black oxide plated for rust protection. Tool hardness is softer than the motorcycle part to prevent damage to expensive crankshafts and flywheels. 5/8in. fine thread bolts used in all pullers. Flywheel thread - Internal