Two part primary gear oil seal tool, also known as clutch oil seal tool.
It includes the sleeve that slides over the primary gear to protect the seal membrane on the gear splines, plus the outer body that pushes the seal home square.
This is achieved by using the flywheel bolt in the end and tightening.
For standard clutch oil seal, see 13H2934
For performance clutch oil seal, see 13H2934MS
For clutch oil seal for injection and 1992 onwards HIF38 carb models, see LUF10005