The CASMA 051F Frenum Hydraulic Patch is the world’s first fully hydraulic patch fitting, engineered to deliver smooth, controlled door closing without the need for floor springs or overhead closers. This EN2-rated hinge integrates a complete hydraulic system into a compact patch, offering both Hold Open and Non-Hold Open functionality. Uniquely designed for effortless installation, the 051F requires no glass cut-outs and fits seamlessly into standard patch fitting footprints, making it ideal for fast retrofitting or new builds with minimal disruption. Supporting doors up to 100 kg and 1000 mm wide, it provides reliable performance in both commercial and residential environments. Its single-valve hydraulic mechanism ensures precise closing speed, while the integrated pivot and backstop enhance safety and durability. Finished in satin or polished stainless steel, the 051F combines minimalist design, advanced engineering, and unmatched ease of installation—setting a new standard in frameless glass door technology.