Easy grip locking handle is accessible from any position. Self-centering locking plate lets you miss the ball by more than an inch. Tight ball fit reduces jarring when changing speeds or on rough roads. User-friendly design enables quick, easy hookup and release. Locking handle cover protects working parts. Cam locking pin affords easy vertical adjustment. 4.5" O.D. Outer Tube/ 4" O.D. Inner Tube. Overall Height 42.25"/ Adjustment 10.5"