1Surface Fabric: The surface layer of the bag is made of nylon fabric, which is strong and wear resistant. The ultra fine fiber connecting pieces are arranged finely, tear resistant and high strength. 2Lining fabric: The filling is made of steel balls, which is harmless to the human body. The aerodynamic design helps increase the projection range. 3Stainless Steel Ring: The throwing weight is equipped with a round stainless steel ring, which can quickly fix the throwing line. 4Portable: Small in size and light in weight, the throw bag is easy to carry and store, very convenient to use, a great accessory for hoisting an arborist rope or line into a tree. 5Widely Used: The throw weight bag is suitable for outdoor sports such as tree climbing, rock climbing, cave exploration, etc.