This billet alignment tool is designed to work with the Getrag V160 / V160 – it is 14 spline and 1.125″ diameter
For a multiplate clutch, you should always use a billet steel alignment tool. The typical plastic tools have too much play and if slightly misaligned can actually cause damage to your clutch discs during the transmission install.
This billet alignment tool is made from cold roll steel, cut to exact tolerances making it the best tool out there for aligning your T56 based clutch.