Cannon Curl + Fit Grips Sport - Arm Blaster Plus Sphere Thick Bicep/Tricep Bar Grips Cannon Curl Arm Blaster + Fit Grips Sport - Bicep Support Plus Sphere Thick Fat Bar Grips Combining Fit Grips Sport and the Cannon Curl by Core Prodigy will transform your grip and arms! By increasing the diameter of the bar, you will feel a greater muscle activation in your hands and arms. This increased muscle activation leads to bigger, faster gains in muscle size and functional strength (especially in overall arm size). We guarantee you'll feel the difference from the very first time you use them. The Cannon Curl perfectly supports your elbows and enables you to keep the correct posture during curls. Users immediately notice proper bicep isolation when curling with the Cannon Curl. Fit Grips Sport (spheres) are roughly the same size as a baseball. The sphere shape allow you to instantly increase the outside diameter of dumbbells, curl bars, resistance bands, pull up bars, push up bars and cable attachments for thick bar (fat) training. By Core Prodigy - Fitness Equipment Leader