Microsculptures are small ivory reliefs, where the size of the microscopic details is often not larger than a hundredth of a millimeter. Their execution required tools similar to those for carving hard wood saws, files, burins, etc., but significantly smaller in size, that is, less than a hundredth of a millimeter. In fact, an ivory microcarving is deemed closer to the carving of precious materials. Since it was not possible for the fine knife to cut the hard ivory at a stroke, successive gentle knocks on a single point were necessary, so it is likely that metal guides may have been used during the carving process. We should bear in mind that, in order to make the tree branches, for example, the tool should not slip even by a hundredth of a millimeter, and this made it impossible to carve freehand.
Haager is a specialist, among other things, in laying in front of the architectural elements a composition of ancient-style statues, or small human groups, as can be seen in some of the pieces from the collection. He also introduces elements of nature: thus, in one of the pieces the shrubs have grown above the temple ruins and, in another, some rocks form a kind of cave where a rambler is entering. All this recreates a sophisticated staging, where he places the boats or the vessel, the key figure occupying half or more of the worked surface.