Specifications: Compatible with any Arca-Swiss standard and RRS dovetail standard ballhead CNC Machined From Aircraft-Grade 6061 Aluminum 1.5" x 3" Type II, class III hard anodized. Mounts directly to M-LOK compatible systems Precision machined aluminum construction for strength without excess weight,functional snag resistant beveled edges Corrosion-resistant hard anodized finish Close-end rail which limits over-travel of your rifle while also serving as installation reference points(close-end forward) 100% MADE IN USA