RUCA USA offers the Silence Hinge. It is a patented pneumatic concealed hinge, and it features a traditional clip-on design with 35mm cup, 10.5mm depth and 45mm hole pattern. It has a 105º opening angle available in various overlays and mounting plates. The Silence Hinge self closes to the final 45º. It is fully contained and meets ANSI/KCMA and ANSI/BHMA requirements, the company says.