Descriptions:This ball handle knob is made of high quality plastic materiel, with long serving life.Widely used in video games, machine, combination machine tools, woodworking machine and printing, textile, food, mining, automobile and other fields, convenient operation.Features:This ball handle knob is made of high qualityplastic materiel, with longserving life.Threaded knob, is a good replacementfor machine operation handle.Fine workmanship, polished surface, not easy to comfortable grip.Thisball handle knobis easy to install, convenient for use.Widely used in video games, machine, combination machine tools, woodworking machine and printing, textile, food, mining, automobile and other fields, convenient operation.Specifications:Material: plastic Type: Ball ShapeDiameter: 40mm/1.57inchHole Thread Diameter: M12Weight:282gPackage Included:6 x Machine Handle Knob