Brock String - Vision Convergence Training Tool - Train Vision, Improve

5 Tightly Fitted Beads on High Quality String Instructions Included Polaroid Fujifilm instax mini 8 Barrel Card Brock String - Vision Convergence Training Tool - Train Vision, Improve Brock String For Shooting 3 Beads Brock String Vision Therapy Sight Focusing Vision Convergence Sports Performance With a 10-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 edge. Bock Sting 10 Foot Vision Convegence Taining Tool - Tain Vision, Impove Stength & Athletic Pefomance, and Moe! 10 Foot Bock Sting Convegence Insufficiency Taine Spots Vision Taining 5 Tightly Fitted Beads on High Quality Sting Instuctions Included 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.