The Really Right Stuff 450mm / 17.7" Multi‑Purpose Cinema Rail is a professional camera accessory bar engineered to give photographers and cinematographers a flexible, rugged platform for mounting cameras, clamps, and other gear. The rail features a double dovetail design that works seamlessly with RRS quick‑release dovetail clamps, allowing gear to slide and lock precisely along its length. Both the top and bottom surfaces have alternating 1/4"‑20 and 3/8"‑16 threaded holes spaced approximately 15mm apart, while additional 1/4"‑20 threaded holes spaced 9mm apart run along the sides for versatile accessory mounting. Laser‑engraved markings at 5mm intervals make it easy to replicate setups and maintain consistent spacing between components. Made from T6061 aluminum for strength and light weight, this 17.7" rail provides a robust, adaptable foundation for building customized cinema and photo rigs, from camera cages and monitors to lighting and audio accessories.