M8 Star Knobs --- The M8 threaded clamp knob is black and is made of plastic. The star shaped knob handle is ideal for the machine tool. Star head diameter: 38mm. Star-shaped knob --- Great for comfortable grip, go with ergonomic design and play anti-slip effect without scratching your hands. Durable material --- M8 knob screws are made of durable plastic for durability and long service life. Wide Application --- M8 internal thread tightening knob is widely used in mechanical equipment, furniture decoration, machine tool equipment, industrial equipment, electronic equipment. Package Content --- Total 8 pieces M8 button screws. They are great accessories to replace your old or broken grips. Functionality 1. M8 internal thread diameter 38mm Star head snap handle. 2. These knob handles are made of durable plastic for durability and long life. 3. Beautifully finished surface for a pleasant grip. 4. Widely used for mechanical devices, instruments and appliances as well as industrial facilities. 5. Great replacement for your star grip with damaged internal threads. Specification The black color Head diameter: 38 mm Thread diameter: 10mm Material: metal, plastic Suitable machine tool: all types Color: copper + black