Clamplock Universal Joint Companion Flanges – Four hole companion flanges fit Spicer type flange yokes. Positive locking and positioning of drivelines to splined shafts on hydraulic pumps for 1350, 1410, 1480 and 1550 driveline PTO drives on mobile equipment such as Concrete Transit Mixers, Cranes,Harvesters, Dump Trucks, Tractors etc. May be manufactured to fit other flange yokes if required. Available to suit most common hydraulic pumps. Also available with agricultural splines.