High-quality galvanized material: The trampoline spring is made of high-quality plastic, which is durable. The finger groove design increases comfort. The surface is smooth and burr-free, bright and grippy. The iron hook is made of high-quality galvanized iron, strong and durable, not easy to rust. Easy to use: The trampoline spring hook is easy to use and operate. You just need to hang the double spring on one corner of the trampoline, then hook the other end to the trampoline with a T-hook, and fix the hook to another corner of the trampoline with a little effort. Easy to carry: The trampoline spring tensioner weighs only 70 grams, is light and small in size, 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 weight. At the same time, it is easy to store, you can put it in any corner or storage bag. Safe and strong: High-quality galvanized and plastic materials ensure better strength and are not easy to break. The force of the trampoline tool is uniform, so you can rest assured to use it to tension the spring. It is safe, firm and stable to use. Wide compatibility: The trampoline spring compressor hook is 13 cm long and 11.5 cm wide. It has many uses. It can be used as a trampoline spring installation tool, tent nail puller or other places where tension springs are needed. Universal trampoline spring tool that can handle all brands of springs over the entire length.