HIGH QUALITY AND DURABLE - These knob handles are made of high quality plastic and copper, corrosion resistant, have good toughness and impact resistance, and have a long service life. STAR DESIGN - The six-pointed star and wire design provides a comfortable grip. The surface is carefully polished, smooth and burr-free, and will not hurt your palm when holding it. EASY TO USE - Screw design, easy to install, just align the internal thread with the screw and twist it with force. They are great accessories and can replace old or damaged handles. EASY TO USE - Screw design, easy to install, just align the internal thread with the screw and twist it with force. They are great accessories and can replace old or damaged handles. YOU CAN GET - 14 x M8 Black Threaded Clamp Knobs. Inner thread diameter: M8; head diameter: 38mm; height: 13mm.