The gear head on a straight-shaft trimmer has a grease port most owners never open — a threaded tube of gear-head grease, squeezed in while you rotate the head, keeps it from running dry and cooking itself.
If a cabinet door swings far enough to hit a wall or the neighboring cabinet, an angle restrictor clip snaps into the concealed hinge and stops the swing short — this one at 86 degrees. A few dollars, a few minutes, no new hinges.