(Used) Swing Mojo - Pro Swing Resistance Trainer

Innovative Bat Speed Trainer: Patented aerodynamic design maximizes drag resistance, increasing bat speed by 15-20% after only a few swings Performance Enhancement: Builds strength in hands, wrists, forearms, and core while fostering proper swing mechanics Universal Fit: Securely attaches to all baseball and softball bats with barrel sizes from 2 1/16 inches to 2 3/4 inches Durable Construction: Made from proprietary rubber-blended material; Compact 12 x 8 x 8 inch size weighs only 11 ounces for easy attachment and storage Versatile Training Tool: Lightweight 11-ounce design suitable for ages 8 and up, from youth leagues to professional players Feel immediate bat speed boost within first few swings positive aspect Strengthens hands, wrists, forearms without altering swing mechanics positive aspect Works with any baseball or softball bat, all ages 8 and up Used - Chip on bottom corner. Please see pics above. Comes with 6 O-Rings for attachment to bat. Still functions well with the chip.