Excellent equipment, high quality. Does the job, I recommend.
Outstanding in every respect. I ordered this assembly with the PX6 rail before I realized PXC1 would have been a better choice. But after receiving these clamps, I decided to keep them, as they are superior to the clamps I have on my other ball heads. With the PX6 rail, they make a fine setup for solid attachment of a large DSLR for panoramic stitches. The knobs are perfectly sized and operate more smoothly than other premium Arca-Swiss plates. They are difficult to separate and reassemble, but once they're set, they couldn't be more solid. First rate all around!
Excellent product. Ability to change orientation is much appreciated.
good quality and workmanship
I have several purposes for this back to back combo clamp. Be aware that this can be taken apart and used as 2 single clamps, as well as being able to be set perpendicular or parallel. The knobs are bigger than they appear in the pictures, which is very good for tightening/loosening. One good purpose I found was to mount it on the EOS 1DX L-bracket (perpendicular), and by adding a plate I can mount the Letus Hawk viewfinder (with a bolt, a standoff, couple washers); this allows the viewfinder to be quickly installed/removed while leaving the L-bracket in place. 'Beefy' and very sturdy build. I may need another one of these.