M8x40 Threaded Black Plastic Clamp Knob Star Shape Screw On Knob For Machine Tool. Knob handles are made of high quality plastic for durability and long life. life. Star shape: ideal for a comfortable grip. Screw type: universally suitable and can be used for most types of machine tools.< /p> Widely used for mechanical equipment, instrument and appliance, food and industrial equipment. Color:M8 X 40 Star Shaped Male Button. These knob handles are made of high quality plastic for durability and long life. Easy to install and use Nice surface finish for a comfortable grip. Widely used for mechanical equipment, instruments and appliances, food and industrial equipment. Head diameter: 32mm Thread diameter: 8mm Threa length: 40mm Type: Screw type Material: metal, plastic Black color Package includes: