Grip Freak 'Slip Grips' Grip Strengthener w Power Rack Arm & Weight Plate Loader Power Rack Suspension Arm fit's Power Racks with 1 1/4" holes Eliminates shoulder's for laser focused targeting of Forearm, Wrists, Hands. Patented 1 3/8" round 'Slip Grip' handles require constant squeeze for grip endurance. Brutely efficient Wrist Roller destroy's all the online pretender's! USA made Commercial Grade with Lifetime Replacement Warranty. 2-3 Day Priority Shipping