Gym Master Post Insert for T-Bar Row and Landmine Exercises Using an Olympic Weight Stack Designed to Develop Rotational Strength via Circle Rotation and Wide-Range Pivot Movement Great For Exercising Biceps, Back, Shoulders and Core Workouts Portable Accessory - Made From Heavy Duty Solid Steel - Fits Inside Most 2" 50mm Olympic Barbell Weight Stacks GYM MASTER Olympic Post Row Landmine Platform Insert for 2" 50mm Weight Discs - YNLWSJUH