[Premium Material]-----These star knobs have premium plastic handle, strong, corrosion-resistant, not easy to break, ensuring long-standing using Also, they are thick enough to give you a firm & comfortable grip. [Brass Female Thread]-----These clamping knobs with brass female thread would match very well with the compatible bolt thread. Holds tightly and doesn't slip. [Star-shaped Handle]-----Using these star knobs nuts on your mechanical projects can really give you a more comfortable hand grip. Besides, you can adjust your machine tools without being scratched. [Wide Application]-----Bring this assorted while versatile kit with you to start your work on mechanical equipment, instrument, apparatus, furniture ., Widely used in every field of industry and life, our star knobs would be a nice selection for you. Colour:black Material:plastic Size:27mm Package Contents: 15 * M6 Star Knobs Nuts Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.