[Various M4 M6 M8 Thread]------- We have prepared three different sizes Stars Knob for you, Universally fit and can be used for most types of machine tools, This Kit Can definitely meet all your daily needs Thread Type is metric thread M8/M6/M4, Thread Pitch:M8 x 1 25mm, M6 x 1 0mm, M4 x 0 7mm [ Thread Size]------- M8 x 30mm/ 0 30 x 1 5inch(DxL), M6 x 20mm/ 0 23 x 0 8inch(DxL), M4 x 12mm/ 0 15 x 0 47inch(DxL); M8 Head Dia (Approx): 38mm / 1 47inch, M6 Screw Knob Head Dia (Approx): 32mm / 1 26inch, M4 Screw Knob Head Dia (Approx): 25mm / 0 98inch [Special Star Shape Design]------- 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 Knob handles are made of high quality plastic for durability and long service life [Wide Application]------- The head is made of plastic, good toughness, strong anti-aging ability, zinc plating on the surface of the screw, corrosion resistance This Plastic Hand Knob Screw is easy to install and remove and does not require any tools Widely used in furniture decoration, electronic equipment, mechanical equipment and other related industries Colour:blackMaterial:plasticSize:S-M8 x 30 x 38mmPackage Contents:20 x M8 Hand Knob Tightening Screw20 x 304 Hex Nuts20 x Flat WashersOnly the above package content, other products are not included Note: Light shooting 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