Sporting a classic tube shape, Strike King?'s coffee tubes are enhanced with real coffee bean granules and coffee bean oil to give the tubes an earthy tinge and a naturally strong scent or taste big bass are eager to slurp up. Not only does the coffee scent or flavor entice and encourage fish to hold the bite longer, it also works to mask human scents. They are salt impregnated too. The 3-1/2 in coffee tube has a hollow head and is most effective when rigged with an internal tube jig head for dragging, jigging or fishing structures with the hook exposed.