WIDE APPLICATION The SCITOO coil spring compressor fit for Macpherson strut coils of various sizes. Working with manual or power tools 12 inch square drive or 1316 inch hex sockets to compress the coil spring to replace the shock absorber unit or spring ; 11.5 inch threaded rod for maximum opening to 10.5 inch on MacPherson struts springs to install the jaws to the coil, suitable for most vehicles with MacPherson strut springs. PRODUCT USAGE Common to strut assembly from vehicle to transfer old spring to new strut, to repairs on bent struts, strut tubes, and damaged pieces. Compress the strut spring coils for convenience when replacing strut assembly and springs contact and builtin detent pins lock the spring coil in place for safer operation. Lubricate threads withseize compound for prolonged life. BUILT TO LAST The threaded rod is made from carbon steel and the hooks are forged steel, highquality materials provide better compression resistance and long service lifetime. Easy to use, suitable for both professional mechanic and beginner use. LOCKED FIRMLY The SCITOO threaded rod has a wide spring contact surface and a builtin positioning pin, which can lock the coil spring in place to ensure safer compression of the spring. 1 YEAR WARRANTY We provide 1 year warranty for you. When doing automotive maintenance always make sure all the tools are correctly used and wear glasses and gloves . Any question or problem, feel free to contact us.