Extrude Individual Faces
Toolbar ‣ Extrude Region ‣ Extrude Individual
Mesh ‣ Extrude ‣ Individual Faces
This tool allows you to extrude a selection of multiple faces as individuals, instead of as a region. The faces are extruded along their own normals, rather than their average. This has several consequences: first, “internal” edges (i.e. edges between two selected faces) are no longer deleted (the original faces are).