Abstract: An item of adjustable furniture having a first support section, a second support section connected rotatably to the first support section by a pair of hinges, and a third support section connected rotatably to the second support section by a pair of hinges. Each hinge includes a pair of discs fastened rotatably to one another by a hinge pin. Each disc includes an array of apertures and a locking mechanism having an aesthetically pleasing J-shaped hook member, a knob fastened to the hook member, and a spring interposed between the knob and the pin. The hook member is removably received within the apertures of the discs when the spring is expanded, thereby locking the hinge. To unlock the hinge and allow for the rotation of the support members for the purpose adjusting the furniture, the knob is depressed to disengage the hook member from the apertures of the discs.