Description This knob are special star shape design, great for comfortable hand grip, accord with ergonomic design and plays a non-slip effect without scratching your hands. Application widely used for mechanical equipment, instrument and apparatus, food and industry equipment. Features - Material:ABS + Stainless Steel.- Size:4.60X4.60X4.30cm/1.81X1.81X1.69inch.- Star hand knob tightening screw adopts a hex star design, easy to grip and non-slip without scratching your hands.- This plastic hand knob screw is easy to install and remove and does not require any tools.- Someone uses as an umbrella handle, maybe it can motivate your project, Is a small and replaceable part.- Widely used in furniture decoration, electronic equipment, mechanical equipment and other related industries.- Can be used for most types of machine tools, this kit can definitely meet all your daily needs. Packing list: 4 x screws