The No Spring Compressor Method is a way of disassembling your coilover or shock assembly without the use of a spring compressor tool. In your coilover/shock assembly, you have a spring that is compressed by a shock between the top and bottom hat, which are connected to the shock. This assembly of shock and spring can be mounted to the frame of the vehicle (via the strut mount on top) and then to the lower control arm (on the bottom). Rather than using a tool to compress the spring enough for you to remove the shock, the No Spring Compressor Method uses the the weight of the vehicle as well as a floor jack, to decompress the spring.