Rotator Machine Multifunctional Grip Strength Trainer 8 to 15 Pounds Adjustable Forearm ExerciserEnhance your workouts with the Burn Machine, adjustable from 8 to 15 pounds. Targeting six major muscle groups, it boosts training efficiency in any environment. Specifications: Product name: Rotator Machine Material: Cast Iron Adjustable range: 8lbs 15lbs 3. 6kg 6. 8kg Packing List: 1* Arm Burn Machine 1* English Instruction Manual Notes: 1. Due to different lighting and screen settings, the item color may be slightly different from the picture. 2.