Anchor your training bag in minutes. The Hayabusa Double End Heavy Bag Anchor fastens to any punching bag to provide maximum stabilization; you only need water or sand. Its large bladder holds up to 900 oz or ~55 lbs of water, the perfect weight to anchor a double end bag or prevent your heavy bag from swaying. Constructed from heavy-duty canvas fabric, with reinforced nylon webbing and a sturdy triangular D-ring on top to distribute tension effectively.