These are medium difficulty. You need to compress the springs to take off one of the ends so it can be removed. Usually the spring is fairly large outside diameter and a large pitch so that it's difficult using the screw type spring compressors with the hooks. They tend to slip on the spring as they are tightened. Your easiest way may be to take the struts off the car and take them to someone who can compress and remove the springs safely. They can install the new ones easily so all you have to do it bolt them back on again.