So you would like to take your heavy bag training to the next level? The Title Boxing Heavy Bag Slip Stick can help. It bobs and weaves to help you improve your ability to slip punches. It comes with plastic D-rings and extra-wide seatbelt nylon security straps with hook-and-loop security and fits most heavy bags.
Simply secure this at the appropriate punch height, and you are ready to go. Costs under $50 at this time.