Find the perfect black hardware for your space. This knob in Matte Black finish is part of our Black line up of hardware. Birdcage Knob. Delicate detail for your elegant décor. An old-fashioned influence with a bold impact. Please note that the screws included with the products are a standard size of 1 in (25 mm) length, quadrex, pan head. They will fit with most of the popular melamine thicknesses, which range between 5/8 in to 3/4 in (16 mm to 19 mm).