Star hand knobs are widely used in industrial equipment adjustment, mechanical fixtures, and DIY tool assembly. Suitable for umbrella bases, woodworking jigs, speaker stands, workbenches, hydraulic lifts, 3D printers, camping equipment, and furniture decoration.SpecificationColor: BlackMaterial: Plastic (Head), Carbon Steel (Threaded Stud)Head Diameter: 38 mm / 1.50 InchHead Thickness: 15 mm / 0.59 InchHeight (Excluding Head): 6 mm / 0.24 InchThread length: 25 mm / 0.98 InchPacking List: 4 Pcs x Star Hand KnobsAdvantageThread knobs feature an anti-slip and durable star-shaped texture design that enhances grip and prevents slipping.Plastic head for a comfortable grip and a galvanized steel stud for rust and corrosion resistance.InstructionAlign the threaded stud with the pre-drilled hole.Hand-tighten clockwise until secure.For removal, simply twist counterclockwise.Note: Confirm size (M6/M8/M10) and head diameter before purchase.