Abstract: A hand-held and hand-manipulated tool adapted to hook or unhook an extension type of helical spring, such as a trampoline spring, to or from an anchoring structure, such as the frame of a trampoline, is preferably formed as a unitary elongate lever of the second kind from steel bar stock advantageously having a rectangular cross section, the end of the lever being adapted to rest on the surface of the spring as a fulcrum, the opposite end portion providing the power arm of the lever and having a handle member formed at its free end transversely of the lever, and a work arm depending from between the power arm and the fulcrum adjacent to the fulcrum and formed to receive and hold the unanchored loop, hook, or eye end of the spring, whose other end is anchored to supporting structure, such as the grommeted margin of the trampoline jump sheet.