New Hejnar Photo Quick Release 3.00 inch rail with ridge for Fujifilm XF 50-140mm f/2.8 R LM OIS WR Lens All single mounting hole lenses required anti twisting ridge to prevent lens rotating when mounted. It is the best quick release system for tripods and monopods when combined with Arca style ball head and quick release clamps. International standard dove-tail rail, compatible with Arca-Swiss type quick release clamps.