Made of high quality 316 stainless steel precision casting, corrosion resistance, no rust, strong and durable. The surface has been polished, with high precision and brightness, which can effectively prevent rust and corrosion. The threads are smooth and the ends are no rough edge and has been polished to ensure that the threads of each product can be screwed out smoothly and the use is safe. Suitable for plus aviaries & pets, and also be used in making saddlery, harnesses & head collars. Widely used in various engineering lifting machinery, metallurgical and mining equipment, port rail handling, electrical equipment,etc.