Sturdy Cable Holder

This is a simple robust cable holder. Why robust? The other ones I designed were too weak. With time, they were bending from the weight of the cables.

With 8 slots, its overall size is about 15 cm (W) x 4 cm (D) x 2.5 cm (H) or 6" (W) x 1"1/2 (D) x 1" (H).