A high quality forged steel U-Joint designed to attach ROTO-BORE drill rods to
plow and trencher boring motors that are equipped with a 1 3/8" - 6 spline PTO
Shaft. To accommodate the hex shanks of our drill rods this unit must be used
in conjunction with our ADC-1300 Adapter for 13/16" Rods or ADC-2300
Adapter for 1" Rods or ADC-1000 Adapter for 7/8" Rods.