[ 1 ] ArmStrong

Used by Major League teams.  A 2-in-1 tool!  As a strength trainer, it increases muscles, velocity, flexibility and endurance with varying resistance.  As a mechanics trainer, it improves form, accuracy, and control. 

Features:

• Patented Rotating Ball for Realistic Training and Superior Comfort
• 3 Bands/7 Resistance Levels to Increase with Player
• Attachments for Indoor and Outdoor Use
• 6 Easy Exercises Included
• For Players at Every Level, from Little League to the Pros