If you ever need to change out the hinge pins and bushings in your doors.... I needed to replace the bushings in my Jimmy door. (Same pins springs and bushings as a 2nd gen Camaro, I believe.) Forget compressing the spring with a vise and using wire or zip ties. I've done it both ways before and even suggested it here. I decided to pay my local O'reilly's a visit and picked up the compressor tool for $8. The instructions on the package say to use a 1/2" wrench. Nope... The tool has a 13MM nut on it. (Must be old packing instructions, prior to being made with a Metric nut.) Just jamb it into the spring and tighten the nut until the spring is free. Reverse the procedure for re-installing! Probably the best $8 I've ever spent! It made the job of dealing with removing and installing the hinge detent spring a breeze?