The world?s first hand-held foam rollers wrapped in patent-pending Triger Point GRID® 3-dimensional surface channels nutrients directly to the tissue for health and mobility. The Triger Point GRID® STK is an innovation in hand-held foam rollers. Specifically designed with Triger Point GRID® surface and AcuGRIP handles to roll, release and relieve minor aches and pains. Convenient size is perfect for the gym, office or on-the-road Patent-pending 3-dimensional surface to replicate the feeling of a massage therapist?s hand AcuGRIP handles for targeted relief Water-resistant Simple-to-clean Backed by a one-year warranty Get off the floor! Use the Triger Point GRID® STK seated or standing to relieve minor aches and pains.