Durable canvas button: These canvas buttons are made of plastic and brass. not only robust to use. but not conductive and light. Just tighten or loosen it by hand. and you could do simple protection on your mechanical projects. Star Shaped Grip Using these screws on knob nuts on your mechanical projects can really give you a more comfortable grip. Whats more. you can adjust your machine tools without getting scratched. Brass Female Thread These brass female thread clamp knobs would match very well with the compatible bolt thread. Holds well and doesnt slip. Wide Application These canvas knobs work well on cabinets. The drawers. the doors. lockers. tool boxes. appliances and other furniture or equipment requiring frequent adjustment. Perfectly fits your various applications. Widely used in all fields of industry and life. our canvas buttons would be a good choice for you. What you get This pack includes 10 M6x40 canvas buttons. manufactured in strict accordance with the standardized metric system. They will do the job