The clip is compatible with Arca Swiss, so wedge-shaped. The problem is that the clamp is too small and doesn't grip the plate with a sufficient point of contact. If you have a thicker plate or lens base, it won't fit. The ball isn't firm enough either, and despite being rated at 12 pounds, it slips when loaded with 8 pounds.
Tripod Ball Head Mount With 360 Degree Swivel And Bubble Levels For DSLR Camera, Tripod, Monopod & More!
14 Review
Neewer Leveling Cameras Tripods Monopods
11 Review
Lightweight Aluminum Travel Tripod For DSLR SLR Cameras And DVs Up To 75 Inches With Carry Bag - Compatible With Canon, Nikon, Sony, Olympus And More.
15 Review
1K Ball Head By Joby: Boost Your Camera'S Stability And Maneuverability
14 Review