Durable Material The hook part of the trampoline spring tool is made of iron. The diameter of the hook is 5mm thick. Sturdy and strong. Surface is coating treatment. Not easy to rust and can be used for a long time. ERGONOMIC DESIGN The handle is made of high quality PP plastic, which is formed in one piece. The design of the finger grooves increases comfort without slipping. Make installation easier and faster. Easy to carry: trampoline spring compressor puller weighs 2 pieces only 68 grams, is lightweight and small and easy to carry. Very suitable for your outdoor travel, please use it when installing a trampoline. You can put it in an outdoor backpack without adding extra weight. At the same time, it is easy to store, you can put it in any corner or storage bag. Easy to use: you just need to hook the double hook spring on one corner of the trampoline, and then hook the other end of the spring on the T-shaped spring hook. With a little force, you can hook the spring in another corner of the trampoline. Wide compatibility: trampoline spring compressor hook is 5.1 inches long and 4.5 inches wide. It has many uses. It can be used as a spring installation tool for trampolines, nail remover for tents or other places where tension springs are needed. Universal trampoline spring pulling tool that can support all brands of full length springs.