[Super practical trampoline spring hook One piece is a two pack which can be used by two people together to quickly complete installation and use. The black plastic handle has a groove design making it easier to grip and convenient to use which can save some time and energy. The material is sturdy made of metal and plastic and can be used for a long time to safely and effectively assemble the trampoline. Two spring tension tools rust proof can also be used for spring disassembly on other machines.]