Adjusting Spax - what are you adjusting the damping? That should be a simple small screw driver or dime in a pinch. OR are you wanting to adjust the spring perch? If the later, it will help to turn the perch with a "C-shaped" spanner from Spax. It can be done with a large pair of channel-lock pliers, but you'll need to take the spring load off the perch and then they'll turn easily.