This works by screwing into the frame in place of where the standard top shock mount retaining bolt went.
By rotating it left and right it allows for super accurate changes to really dial in your suspension, to lock to the set height, tighten up the M10x1.25 pinch bolt which is down the centre.
Please note , you will need to tap the top of shock mount to M10x1.25, no drill is needed the hole is already at tapping size.