This product is made of high quality brass and is available in either a glossy or matt chrome finish. The knobs have a square shape and measure 35×35 mm. They have a hole size of 14 mm and are suitable for glass thicknesses of 8-12 mm. The door knobs are easy to grip and offer a noble look. They are also an excellent choice for those who want to add a touch of class to their home décor.