Question 1: What is the material of the housing used for self-service tensioners? Question 2: What is the main function of the unloading buckle, the safety tensioner, in the rigging? These three questions are all related to rigging and therefore very important. Then, the next, I will give the correct answer. Question 3: Wire rope rigging, how to understand? What is the name of the end woven into the "O" shape? Wire rope, used for lifting, pulling, tensioning and handling ropes. It is woven into the "O" shaped end, called "O" wire rope. Question 4: What is the shell material used for pressing wire rope? The shell material used for pressing wire rope is usually made of aluminum. Question 5: Rigging.