M5 model Ring screw shank total length 59mm, thread length 35mm, bushing inner diameter 9mm(Product measurement in millimeters, 1mm=0.0393701inch) <br> Stainless steel 304, high hardness, corrosion resistance, can be used in humid environments, and do not worry about rust <br> Product advantages: 304 stainless steel rings, durable and resistant stainless steel rust. It is made of super big machine. After many experiments, it is proven that the exterior will not be oxidized and rusty. <br> Product features: for home, office, hotel and other places, from the role of attachment and suspension. Can be screwed into wood or masonry using a suitable stud <br> Suitable for light-duty applications <br> Due to factors such as manual measurement and differences in display, there may be slight differences between individual products and images, please excuse me.