Rondò is a concealed hinge system patented by Bauxt. Adjustable on three axes (height, width and depth), the Rondò system ensures the perfect flush fitting of the door (between frame trim and door leaf with the Monolite range or between wall and door leaf with the Monolite RM range) while allowing a full 180° opening of the door. 180° opening of flush-fitted doors is important to prevent transferring the rotation torsion stresses onto frame, counterframe and ultimately to the wall, generating the undesired cracks on the plaster at the side the door that frequently occur when a hinge with a shorter range of rotation is used instead. Concealed hinges, visible when the door leaf is open, with black cover and steel insert. Lab-certified tensile strength at break of 550kg per hinge. Over 450,000 opening cycle, of which the last 100,000 in laboratory cold cell, with injections of liquid nitrogen at -195° C directly onto the hinges – WITHOUT REACHING BREAKING POINT.