The neutral colors of black and grey make up the simple yet modern design of this iron- and polyethylene-made wall clock. Such a color theme, the plain hour and minute hands, the numberless face, and the toothed wheels focal point speak well that fewer elements is more. Wall clock diameter is 18.25". It runs on a removable battery and hangs on a hook or screw via a built-in metal backing.large metal gear wall clocks, metal gear clock, metal gears wall clock, metal wall clock with gears, metal gear clock kit, metal gear wall clocks.