These Cable Hooks are made for 1" T slot profiles fitting 80/20, Tnutz, McMaster and similar rails.
There is a horizontal mount version, and a vertical mount version. Both offer an indexing hook every 90 Degrees to keep hook in place. Just lift the hook up along the shaft, rotate 90 degrees, and drop the hook down into the indexing slots.
Each hook includes hardware (10-32 screws and slide in nuts).
Small 2.5"x5" "J" Hook (Headphone hanger, light cables, accessories)
Black Base with yellow tip.