Ultimate Body Press Push Up Accessories for Fast Upper Body and Abdominal Results: Premium Flat Palm Push Up Blocks… $28.33 – $32.06 Make sure this fits by entering your model number. DESIGNED IN THE USA: Heavy duty ball bearing wheels spin independently so you roll smoothly under power in arcs and straight lines. Independent wheels are able to return to your start point without a fight and rapidly develop grip and wrist strength ECCENTRIC COMPOUND EXERCISE: Muscle builds when a contracted muscle lengthens and ab roll outs contract and lengthen nearly every muscle in your upper body. Working large muscle groups together spikes your metabolism for the fastest results