The mountains reach their highest point, 1,052 m, in the Klementkogel (or Kapaunerkogel, Slovene: Kapunar) in the municipality of Großradl in Austria.

The main chain of the mountains forms the watershed between the rivers Mur and Drau as well as the national border for much of its length.

The border generally follows the boundary between the districts of Leibnitz and Marburg on the one hand and Deutschlandsberg and Windischgraz on the other, that are documented in the map sheets of the current topographic survey.

The Possruck is a low mountain range with a complex combination of crystalline, Palaeozoic and Tertiary rocks.

In addition several state and local roads, such as that from Langegg in the west to Jurij in the east, from Großwalz to the Kirche zum Heiligen Geist am Osterberg, from Großradl to St. Pankratzen/Sveti Pankraciji, from Oberhaag to Remšnik (Remschnigg), from Arnfels to Kapla (Kappel) and from Schloßberg to Gradišče (Schlossberg).