- IMPROVES CONVERGENCE & PERFORMANCE: Convergence training using a Brock String can be useful for convergence insufficiency, as well as strength and athletic performance.
- SPORTS PERFORMANCE: With a 6-foot long string and 5 tight-fitted beads, this Brock String is great for training the eyes in sport-specific positions – giving you the ultimate athletic edge.
- EASY TO USE: You can use Brock String right from the comfort of your home with a very short learning curve involved.
- HIGH QUALITY: This Brock String is designed with an extremely high quality, and highly durable string and beads.
- Instructions Included