A. The support top detaches; you screw it onto the cabinet base or press-fit the sleeve into a drilled hole. To easily adjust the supports, you can either put a slot screwdriver into the side of the foot to rotate it or rotate from above.
B. The optional kick-plate clip lets you snap a kick plate directly onto the support post. Two bases come with each clip, one a screw-on and another that glues into a biscuit slot. Both have 1" of lateral adjust after attachment. Since the clip slides up or down on the support, you can ensure that the kick plate molds to the floor. Any gap at the top cannot be seen.
Approximate support spacing is every 30". Altogether an excellent system, particularly suited to the uneven floors of today's houses. Adjusts from 3-5/8" to 5-7/8".