If you are thinking of replacing the front struts on your Bonneville Autozone has a nice tool for taking the tension off the coil spring. [Rears do not require spring compressor]. It has two spring compressors in one package. It is from Great Neck and part number is 25550. Price is only $35 for two compressors. They lock onto spring top and bottom with supplied bars and can't go anywhere because of lock pins. Nice design actually. Guaranteed for life also. Local shop here wanted $75 to replace struts with struts already out of the car. So I did them myself for less and still have the tool. Hope this helps.