Replacing the front section of the PTO driveline with a Sliding Collar-Lock-Type Coupler allows a farmer/rancher with only one hand to couple the shafts. Instead of depressing the lock pin, a collar encircling the yoke end is slid back until the shaft is slid on to the tractor's stub. The sliding collar lock can be held back with a prosthetic hand while the strong arm supports the shaft weight.