Long threaded rod with two hooks or fingers that spread to go on coils, like a puller for a crank gear. The other end of the rod has a nut with a roller bearing that goes against the 'spoon', for a better name, shaped like the business end of a pickle fork. This spoon has two sets of ridges depending on the width of the spring on the open end. Extension and socket to compress spring, The trick is to align spoon, while compressing, in a manner to slide out after spring is installed and tension removed. I'll post the pt# tomorrow.