The material of safety hook is usually divided into stainless steel, alloy steel or aluminum alloy. Steel hooks are hard and heavy, and are suitable for attaching anchor points or for contact with sharp metal equipment, such as safety harnesses and descenders.
Due to the many types of stainless steel, there are many standard grades, and there are also a large number of widely used non-standard grades. These grades have different performances. At the same time, there are a large number of widely used non-standard grades.