An articulation assembly includes a proximal joint, a distal joint, a joint housing, and a plunger. The proximal joint is configured to couple to a central section of a drive shaft and to rotate in response to rotation of the drive shaft. The distal joint is rotatably coupled to the proximal joint such that rotation of the proximal joint effects rotation of the distal joint. The distal joint is configured to couple to a distal section of a drive shaft to rotate the distal section in response to rotation of the distal joint. The joint housing is disposed over the proximal and distal joints. The distal joint is rotatable relative to the joint housing. The plunger is engaged with the joint housing to prevent the joint housing from rotating from a centered position until the distal joint reaches a maximum articulation angle.
