The Ringside Heavy Bag/Double-End Bag Anchor will stabilize your bag and limit the sway, increasing resistance to the user. Simply add 35lbs to 50lbs of sand (sold separately) and get the most out of your next bag workout. Features: Anchor for heavy bags or double-end bags Premium constructed vinyl with reinforced nylon webbing Holds 35lbs to 50lbs pounds of sand Attached D ring for maximum stability Additional Details: