If you are looking for a professional and nut knob, then your research is over here. That’s because our product can meet your need. Adopted of , it is practical and for long time use. Resistant to corrosion, excellent workmanship, no burrs. Widely used in mechanical equipment, furniture decoration, machine tool equipment, industrial equipment and electronic devices. Features - Color: Black. - Material: Plastic. - Size: About 3.5x3.5x1.5cm/ 1.38x1.38x0.59inch. - They are made of plastic for durability and . - Great for comfortable hand grip, with ergonomic design and play a non-slips effect without scratching your hands. - The star shaped button handle is for machine tools. - Come with different kinds of knobs, great accessory to replace your old or broken one. - Widely used for mechanical equipment, instrument and apparatus, food and industry equipment. Package list: 16 x knobs