Novoflex Quick Release Plate for Q-Base System, 6" 
The Novoflex Q=Plate series QPL-4 Quick Release Plate fits any Arca-type quick release system (except the Arca Swiss Flip-Lock), and features three camera mounting screws (one 1/4"-20 & one 3/8"-16) and three slots on a 6" long plate, allowing a broad placement of the camera screws relative to the plate or one another.
The bottom edges are dovetailed for smoother loading and unloading from the clamp, as well as less abrasions. The screws of the Novoflex plates work with both traditional flathead screwdrivers as well as 5/32" Allen wrenches.