Calculated Kinetics SIG Romeo 1 Pro Cut W/RMR Holes to any RMR Footprint optic. Optic Plate is duty rated to withstand the abuse required by any application. These plates fit any RMR Footprint and any SIG Romeo 1 Pro Cut With RMR holes that have 2 channels on the milled space. Hardware, Torx Bit, Vibratite, and Install Card included. Fits P211 GTO and P320 with RMR holes.Features :Fits Sig P211 and P320Designed for RMR Footprint OpticsIncludes Hardware, Torx Bit, Vibratite, and an Install Card