The XL Quick Swap Base gives you the confidence to train without holding back. Fill it with up to 275 lb of water to create an unshakable foundation that stays planted through every powerful punch, explosive kick, and driving knee. Switch between any Quick Swap top in seconds to develop power, precision, speed, and timing on one heavyweight base. Train harder, adapt faster, and never outgrow your setup. Quick Swap Compatible: Unlock the full potential of your training with the Quick Swap System. Switch between any Quick Swap top in seconds to sharpen power, precision, speed, and timing without adding bulky equipment. One compact system gives you the freedom to train more skills, in less space, on your terms.