Ideal for compressing coil springs to replace shock absorber unit Re-Engineered hook design fits more spring sizes Drop forged and heat treated construction for durability Built-in safety pins to lock spring more securely Quick and safe setup 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 pins in the lock position on hooks. 5. Using a 3/4"or 19mm socket and ratchet turn the main shaft compressing