Brand new never needed to use it. This item is designed to compress most MacPherson Strut Spring sizes. The broad spring contact and built in detent pins help to lock the spring into place for safer spring compression. This OEMTOOLS Strut Spring Compressor quickly and safely compresses the spring for easy replacement of the strut cartridge or strut assembly repair. The hooks are forged and the center screw is hardened for long life. Note: Lubricate the threads of this tool with anti-seize compound to prolong the life of the center screw.