【Durable Star Knob】: These star knobs are made of plastic and brass, making them not only sturdy but also non-conductive and lightweight. Simply tighten or loosen them by hand to create a simple protective cover for your mechanical projects. 【Star-Shaped Grip】 Using these screws on knob nuts for your mechanical projects provides a more comfortable grip. Additionally, you can adjust your machine tools without scratching yourself. 【Brass Female Thread】 These clamping knobs with brass female threads fit perfectly with compatible bolt threads. They hold securely and won't slip. 【Wide Application】 These star knobs work well on cabinets, drawers, doors, lockers, toolboxes, appliances, and other furniture or equipment requiring frequent adjustments. They are perfectly suited to your various applications. Widely used in all areas of industry and life, our star-shaped buttons would be a good choice for you. 【What You Get】 This pack includes 10 M8x40 star-shaped buttons, manufactured in strict