The Ultimate Arm Builder! Fat Gripz are being used by many top bodybuilders, pro athletes, US Special Forces soldiers, MMA fighters and thousands of people around the world. Thick bar training with Fat Gripz immediately targets your body"s weak links - increasing muscle activation and giving you more strength and mass.Fat Gripz fit virtually all barbells, dumbbells, chin-up bars and cable attachments in seconds - making the bar more than twice as thick.Made from a military-grade high-density compound, they grip the bar like a clamp and don"t compress2.25" (5.5 cm) thick when closed. That"s over twice as thick as most Olympic bars5" (12.5 cm) long. That"s big enough to fit your hands and small enough to have a snug fit in virtually every dumbbellFat Gripz will give you the benefits of thick-bar training - at a fraction of the priceUnlike products that you squeeze to get a stronger grip, thick-bar training with Fat Gripz improves your grip when it"s at its weakest - when lifting heavy weights