SUPER SMOOTH LINE-The line is made of UHMWPE rope, which itself is very smooth and slides very well,197ft thick slick throw line has a 500-pound tensile strength, The surface material of the tree throw bag is XPAC, 5-layer construction, and the inside is filled with lead. It weighs 8.8 ounces and measures 4" in diameter x 6"in height. You can sling shot it into trees or coil it for storage without kinking or impeding the accuracy of your throws.  EASY TO USE- The practical throwing weight bag is equipped with a round stainless steel ring for quick connection with the throwing line. Designed to increase the range of a throw and designed to easily move through branches to set your line, these heavy-duty throw weights were built to last. It does requires some practice and you will get better at throwing.  DURABLE COMPLETE KIT: With microfiber material at connection part, fine alignment, tear resistant and high tensile strength,The throw weight kit is a complete kit. It comes with a throw weight 8.8 oz/10.6oz/12.4oz(choose weight what you need), 197-foot 4MM rope, and one polyester storage bag.The throw weight is made of strong 600D and METAL STEEL BALLS inside, Storage Bag can hold the full set with 197 Feet Lines.  MULTI-USE KIT-This rope throwing bag kit is suitable for tree work, rock climbing, tree climbing, adventure activities, rigging, mountain climbing, etc. With this throwing bag, you no longer need to hire any tree company to cut off your high limbs or set up swings, and you can operate it conveniently.  SERVICE GUARANTEE-Guarantee that if you are not satisfied with the products we receive, you can send us an email at any time. We will reply you immediately within 24 hours to help you solve the problem.