HFS R MacPherson Strut Spring Compressor | 2pc Install Remove Coil Springs Heavy Duty Allows for repairs on bent struts, strut tubes and damaged pieces Compresses the coil spring to replace the shock absorber unit or spring Forged construction, Acme threaded rod with built in detent pins to lock the coil in place. Fast and easy setup Blow molded case protects components and provides easy transport.