Per4M Quick Puncher: * For strike and dodge training to improve total body quickness and coordination * Cord tension can be adjusted for novice or advanced users * Punch ball is soft, durable and designed for frequent use * Quick change ball lock allows for easy ball height adjustment * Weighted base keeps unit in place while in use * 10 different drill cards for training and practicing * Polyethylene, polyurethane and sand * 90-day limited warranty