It has always been cumbersome to store pens of varying thicknesses in pen holders, until now. With our revolutionary Adjustable Elastic Band, you can store all your writing instruments snugly. In addition to the 10 Pen Slots, the Companion contains a dedicated slot for an additional refill/cartridge. The right side also includes a storage pocket for an Endless Storyboard Pocket notebook, documents or any standard pocket notebook. Let the Companion take care of your tools, while you take care of creating!