Secure to any Century Wavemaster (TM) or Heavy Bag to add uppercut strikes to your hand technique training. Bag is constructed from a dense foam core with a durable slip resistant cover. The adjustable web strap with quick release buckle allows the product to be easily adapted to most training bags. For use with the Wavemaster, Wavemaster XXL, Kid Kick Wavemaster, and the TKD Wavemaster.