This 2 part billet aluminum tool is used to accurately adjust the MSD mag while the engine is running. The aluminum ring remains clamped to the mag and the removable handle makes the job easy.
Can be clamped on a vise or mounted on a table. Also includes a smaller feeler gauge set for setting plug gap.
Clutch feeler gauges .040 thru .070 (by 5). Complete set of 7.
Billet Handles for $50.00 each.