The Leofoto MA-40 40mm Ball head is purpose-built for heavy equipment support from the ground up. It comes with a lever release to lock/unlock the ballhead and a dual clamp system for both the ARCA Dovetail standard and Picatinny rails in the same unit. The MA-40's lever release allows for quick adjustments of the ballhead.
Height: 88mm / 2.17 inches
Ball diameter: 40mm / 1.57 inches
Mounting hole: UNC3/8""，M4
Weight: 370g / 0.812 lbs
Max load: 20kg / 44.09 lbs
Based on 1 review
It's awesome for the price. Really smooth, very stable when locked. Holds a heavy AR10 in any position.