yeah they're HKS Hipermax's, unsure if 1's or 2's but thinking hipermax 1's as you have the anodized spacers rather than helper springs. May be wrong about that though.
More importantly they are damper adjustable. Dont use a spanner on the top, you need a long allen key as mentioned earlier. Sorry but cant remember what size & mine is at my folks place so not at hand to check for you, perhaps get onto the HKS USA or japan websites & you might be able to find the info (or order the tool).
They might not 'click' as in make a noise but as you turn it you should be able to feel it as it adjusts. If they're Hipermax 1's you should have about 12 steps of adjustment, if they're 2's you'll have up to 30.
As for adjusting the height you need to jack the car up to take the weight off the spring. Then you need 2 C spanners & you spin them in opposite directions. As mentioned soak them with wd40 or something to loosen them up.
oh & the middle bit will just be sitting there, its just a spacer so your springs dont bounce around when the weights taken off the shock, you need to spin the top nut & bottom nut.
quality shocks by the way, just tell the missus to suck it up!