Quick release L-bracket & camera grip custom for Sony a7 / a7R; The base plate has reserved extra 1/4""-20 threaded mounting holes and strap hole for additional functions; Feature: Compatibility: Standard Arca-Swiss dovetails, compatible with Arca Swiss, RRS, kirk, Wimberley, Markins, Sunwayfoto, Benro, Suri, Fotopro... brands with AS stardard; Production Process: CNC