TBS Tilting Base with Screw Adjustment - PrimeBioscience
Adjusting angular position of a lever 1 - YouTube
Amazon.com : Proaim Big Multi-Angle Wedge Plate for Camera Setup Levelling. 90° Adjustment Offers Variety of Shots. Adapts Heavy/Light Cameras, w/Bubble Level. for Tripod, Slider, Car Suction, Gear Head (P-MWP-B) : Electronics