You just found a 20lbs davenport anchor and can't figure out how you can get this prize back to the surface. You need a lift bag. You never know what you're going to find on a dive that is worth money, so always pack a lift bag when you go diving.
This 50, 70 or 140 pounds of positive lift bags (see size selection), are easy to bring on any dive. 50 pound Lift bag rolls up into a compact size, which will easily fit in most BCD pockets ready when you need it. Bags are made from heavy-duty bright and easy to see on the surface orange PVC material with strong and durable nylon webbing rigging. A large marine grade brass spring loaded bolt clip is attached to the end of the bag rigging for quick and easy attachment to your treasure!