DO NOT USE IMPACT DRIVER! Caution? A compressed spring can inflict bodily injure, always wear safety glasses and gloves Instructions: 1. lubricate both main shafts with oil. 2. Align the hooks with the safety pins backed off so the hooks will fit over the spring 3. Position both set of hooks 180 a part, opposite each other. 4. Push safety locks in the lock position on hooks with even pressure on both sides. 5. Using a 7/8"or 22mm socket and ratchet turn the main shaft compressing the strut spring enough to safely remove the fastener nut holding the cartridge Designed to compresses the coil spring 300mm Allows for repairs on bent struts strut tubes and damaged pieces Includes forged construction acme threaded rod and builtin safe lock Professional use only. Do not use impact driver. Push safety lock in the lock position on hooks with even pressure on both sides. Storage Case for Storage, you may receive red or blue case