[Revolutionary Technology]: POWERSTACK Rebreakable boards for martial arts training teach force through impact, accuracy and power without the fear of board bite [Less Pain, More Gain]: Rubber-tipped quick-snap locking design makes breaking (and snapping back together) painless, quick, easy and fun [Level Up!]: Our revolutionary magnetized Maglock mix-and-match stacking system allows you to customize your resistance to match your needs [Precision Training: Clear, easy-to-see rubber target area for maximum shock absorption helps you stay on task to become precise and accurate in your strikes [Fun for the Whole Family]: Perfect training tool for adults and kids alike -- hold the board for your partner (or kid) and learn together! Take a break from boring. Welcome to the World’s best training target. The POWERSTACK patented stacking technology allows for almost unlimited combinations of resistance. Mixing and matching the different the different levels and stacks provides athletes with the flexibility to advance incrementally at their own pace. POWERSTACK boards are a more effective solution for teaching force through impact, accuracy,and power, all without the fear of board bite. The shock absorbing rubber accuracy target provides a focal point for maximum efficiency and helps minimize the negative effects of impact. The ergonomic design of the POWERSTACK boards makes it easy for instructors and students to hold by better aligning joint angles and providing a more forgiving target area for off-target strikes.Premium grip pads also provide shock absorbing properties and help maximize non-slip grip. Finally, forget all the difficulty of re-assembling the board with each break. Our quick snap locking design makes snapping the board back together quick and painless.