The EyeDirect Adjustable Baseplate with L Bracket for Mark II is an exact replacement for the baseplate and L-bracket that came with your Mark II. It includes the baseplate, L-bracket, mounting screws, and a 7/32" Allen Key.
The baseplate features a movable mounting block or "traveler" that has 3/8"-16 and 1/4"-20 threaded mounting holes for mounting to your tripod. The baseplate is formed to provide a channel for the traveler to slide within. Four knobs secure the traveler in place in the baseplate. Slots in the top of the baseplate enable mounting and positioning of your camera. There are two mounting positions for the L-bracket, which provide 4.5" of vertical adjustment to the Mark II unit. The L-bracket can be mounted oriented to the left or to the right.