Size: (Product measurement in millimeters, 1mm=0.0393701 inches)M4: bushing inner diameter is 10.41mm, bushing outer diameter is 17.77mm, and thread length is 10.83mm.M5: bushing inner diameter is 13.55mm, bushing outer diameter is 22.43mm, and thread length is 10.86mm.M6: bushing inner diameter is 16.28mm, bushing outer diameter is 27.12mm, and thread length is 12mm.M8: bushing inner diameter is 20.8mm, bushing outer diameter is 35.7mm, and thread length is 14mm.M10: bushing inner diameter is 25.7mm, bushing outer diameter is 42.82mm, and thread length is 18mm.304 stainless steel, high hardness, corrosion resistance, can be used in humid environments and dont worry about rustingProduct Advantages: 304 stainless steel male thread hoist ring eyebolt screw, it is made of very large machines. After many experiments, it was proved that the exterior would not be oxidized and rusty.The eyebolt is a fixing and binding tool used for lifting some equipment for wire tie to reduce cable tie problems.