The DPL-04R Universal L-Bracket from Sunwayfoto is an Arca-type and RRS lever compatible bracket CNC machined from aluminum. It has a wide 2" (50mm) base for increased stability, and a strap slot for a neck or wrist strap to make carrying the camera with the QR plate attached easy and comfortable.
An L-bracket can maximize the stability and efficiency of using a ballhead when changing from horizontal to vertical orientation, eliminating major positioning shifts. This bracket has five screw mounting holes that allow you to adjust the mounting position in the range of 1.6 to 3.0" from the screw hole to the side of the vertical plate.