These top-adjust cabinet levelers are very useful. They have a socker for an allen wrench in the top. The top-adjust means you can put them in the rear of a base cabinet and access them from inside the cabinet.
leveler.jpg
However, at 3" tall, they're too tall for a design I'm working on. I'd really like units which are 1 1/2 tall or less. Anybody know of one?