TriSlider™This multi purpose training tool is a slide and balance trainer all in one and has been designed to be used with the Stick Mobility Training Stick or as a stand alone training tool so you can get more out of your workouts. The TriSlider has 3 main configurations Slider with Balance Disc Slider without Balance Disc Balance Disc with Slider INCLUDES: Two Stick Mobility TriSlider Discs and two high density Foam Balance Discs DUAL SIDED: Smooth plastic on