![Tach Drive Adapter, Tang to Square Drive](http://madracingparts.com/cdn/shop/products/8491_{width}x.jpg?v=1580688221)
The standard tach drive for MSD Tach Drive Distributors is a 3/16" tang drive cable. In most cases this type of drive will work, but for those who require the 0.104" square drive (Corvette style), MSD offers a Tang to Square Drive Adapter to fit all MSD Tach Drive Distributor assemblies.
This adapter is included with each MSD Tach Drive Distributor.