حَبْلٌ مِنْ مَسَدٍ
A rope of twisted fibre. (111:5)
Ḥabl names a rope generally; min masad specifies the material or kind. The added phrase makes a relatively general object more tangible. Here min naturally indicates material or composition, not an automatically fixed partitive sense.
The surah ends in a concrete image—neck, rope, and its material. This can be approached through the principle of clarification after a general mention, provided the description is recognized as completing the imagery rather than as pointless wordiness.