It was this type of compressor that sent me to the emergency room in June of 2005. After already removing the passenger’s side spring, I was working on the driver’s side assembly and had compressed the spring and was in the process of removing it when the compressor slipped, the spring decompressed and pinned my right hand by the three middle fingers palm side up, between the bottom of the coil spring and the spring perch. Engaging this type of compressor requires using two hands and, of course, I was alone, the garage door was down, my cell phone was on the passenger’s side fender out of reach and most of my tools, at least any that could have been effective in freeing my hand, were on the floor next to the passenger’s side where I had already pulled the suspension apart. All I had within arms reach was the ½” box wrench (no more than 6” long) that I had just used to remove the shock. I jammed the wrench in between the spring and the perch and was able to pry the spring up enough to get the finger next to my pinkie free. I then pried on the opposite side and got my index finger free. To get my middle finger out, I pried again with the wrench and pulled as hard as I could with the trapped arm and got my hand out. To make a long story short, I still have all my fingers and they still work, however, I occasionally feel some stiffness in the middle finger joints. I was lucky!!!!! Needless to say, it is my personal mission to convince everyone to use a bolt-in type compressor.