As an accessory to owners and users of ballheads seeking to make use of Arca-Swiss-type plates, this Acratech Leveling Quick Release Clamp is a great tool for leveling the horizon or other visual elements that need to be aligned. The lightweight CNC-machined plate features a beautiful satin black anodized finish, and is very easy to use.
The level is an easy-to-read 15mm dome with a bubble. The quick-release clamping mechanism possesses a detent pin that prevents accidental slippage of the quick-release plate. It features 1/4"-20 and 3/8"-16 threads, which makes it compatible with virtually all standard tripod heads.