Details: Main products: 1. 45# carbon steel universal trailer hook 2. Stainless steel trailer hook with stainless steel brushed and mirror polished Products from Xieyue Technology originate from Mechanics，and finalized after hand calculation, simulation, and practicalMechanics Testing. In the manufacturing process, strictly composition control, flaw detection, tensile testing, and other dynamic quality control are committed. Sothe quality is guaranteed. We are committed to manufacture,meanwhile focus on research and development; with improving technology and professional team, each product is precisely manufactured in accordance with international standards of carbon steel and stainless steel. The specially designed safety ring strengthens the effective mechanics. The cross-section, the main mechanical design adopts the classic triangular mechanical distribution structure, and the strain tolerance is several times that of traditional carbon steel and stainless steel tiger-head hooks. Every product undergoes strict quality inspection before leaving the factory. The workmanship is excellent, and the appearance is clean and smooth. It is our company's factory standard. It has maintained a good reputation among industry products and has been recognized by customers at home and abroad. 2. Regarding the screws: For safety reasons, we do not equip stainless steel screws at all, in order to eliminate potential accidents. We are equipped with 12.9, 8.8 grade super cold forging screws, and have carried out a strengthened plating treatment, the anti-rust ability is higher than that of ordinary stainless steel. If users use stainless steel screws on their own, our company will not be held responsible. Regarding the strength of the towing hook: the screw is a standard part, the diameter of the screw of the same specification is the same, in order to increase the strength, only high-strength materials can be used. The mechanical section size of the trailing arm can have a lot of room for improvement. Therefore, the towing hook of our company uses increased arm size and effective mechanical structure distribution to obtain ample strength margin. This is the reason why the product of Xieyue Technology looks bigger than ordinary towing hooks.