Knob handles are made of high-quality plastic. Solid structure and not easily deformed. Durable and corrosion-resistant. Can be reused and not easily lost. Featuring a star and thread design, the surface is carefully polished for a comfortable grip. The surface is well polished and offers a comfortable grip. You can easily tighten the screw with the star-shaped nut by hand. No hand slippage. No need for other tools, so you can repair your tools at any time. They are great accessories to replace your old or broken knob handles. For securely holding and fastening operating parts on assemblies, units, and machines. Star knobs are ideal for machine tools, factories, machines, household appliances, the food industry, and the pharmaceutical industry. Such as cabinets, cupboards, drawers, etc.