The Harbinger Big Grip Bar Grips are made from a proprietary high-density compound that attach to the bar like a clamp and don't compress, converting barbells, pull-up bars, and cable attachments into "fat bars". Fat bar training activates more muscles when lifting, and builds bigger, stronger arms and upper body faster.

Product Specifications:

• 1.25" (3.2cm) diameter
• 5" total length.
  
• Can be used on both Standard and Olympic sized barbells.