TRIBELLS 4" SINGLE blows away single tricep ropes and dumbbells! Because you grip TRIBELLS Hi-Tech hemispheres like a ball. To be thrown down against a Cable Weight Stack. To deliver way more consistent resistance than ropes or Dumbbells can. Fan the flame for gains with patented TRIBELLS. To build Symmetrical Triceps and Blazing Forearm Power! By freeing muscles for maximal force production. With TRIBELLS 'Live Wire' cable suspension. That's completely superior to thick, inflexible triceps ropes. Get freakish triceps workout results with a TRI BELLS 4" SINGLE! 500# pull rated & complete with Lifetime Replacement Guarantee. US Patent # 8,491,448 B2 TM