The first step in installing the new shock and spring assembly is fitting the springs to the shocks. Spring removal and installation for a coilover assembly requires a spring compressor. Without one, it's impossible to get the new spring compressed enough to lock down onto the shock. Removing a coilover spring from a shock without a compressor will send the fastening nut, spring cover, and spring rocketing across the shop with lethal force. Use of the spring compressor requires care and attention; compress each side a few turns at a time. Misuse of this tool can prove to be a lesson in ballistics, resulting in broken fingers--or worse.