Ball end blanks & female end blanks before machining. The pieces have a bored ID hole & machined OD, done in one setup for concentricity. Also shown are the 8-32 splined cone point set screws & splined wrenches. Cone point set screws are used in conditions where severe vibration is present. A matching cone shaped seat in the shaft, plus #271 locktite, prevents the set screws from coming loose; unless they are heated.