North Shore Commercial Door is the place to go when you need to buy garage door couplings and garage door shafts. We offer a garage-door 1¼" solid shaft coupling that's 4" long and a 1" solid shaft coupling is 4 ¾" long. Both have ¼" keyways and both are made from low-carbon steel. We also offer a 1" tube coupling without a keyway that's 2 ½" long. Need a garage door shaft key? We offer them in bent and straight shapes. If you need torsion shaft couplings, we stock garage door shaft center couplings with either a 1¼" shaft diameter or a 1" shaft diameter.