Fat Gripz ORIGINAL are the new worldwide training phenomenon which helps add muscle & strength to your upper body (especially arms) in record time * TO AVOID MISSING OUT ON GAINS, WE STRONGLY SUGGEST MASTERING THE ORIGINALS FIRST OR USING THE EXTREMES WITH THE ORIGINALS (IN A DROP-SET MANNER) * CAUTION: WE DO NOT RECOMMEND BUYING THESE FAT GRIPZ EXTREMES BY THEMSELVES; THEY WERE DESIGNED AS A PROGRESSION FROM FAT GRIPZ ORIGINAL (BLUE) * Fat Gripz instantly convert barbells, dumbbells & chin-up bars into THICK BARS (more than twice as thick) so that you can train the way many pros do * Used by thousands of athletes and military, including many Special Forces soldiers, NFL players, top MMA fighters, bodybuilders and Cross Fitters