You just found a 50 lbs (23 kg) 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. XS Scuba offers 100 lbs (45.4 kg) Lift Bags with a unique "anti-spill" bottom with baffle to allow easy fill from any device and prevent lift bag from dumping air or taking on water when it hits the surface.
Bag is equipped with over pressure relief valve (OPV) with pull for manual release of air, has a stainless steel D-ring at top for attachment of a slate, strobe or light and elastic loop at top for attachment of chemical light, all to improve Surface Visibility Day or Night. Inflation of the SMB is made easy with the Combination Oral and BCD Quick-Disconnect Inflator Valve. Lift Bag has lifting straps with stainless steel D-ring at the bottom to attach rigging.
Lift bag rolls up to a compact size and stows compact in an included 6.5" X 12" (16.5 x 30.5 cm) Mesh Carry Pouch. The Pouch comes equipped with Grommets for Back-Plate Attachment for added conveniences (mounting hardware not included). Once you have your prize at the surface, the Lift Bag is also equipped with a Lifting Handle at Top for easy retrieval from a boat or dock. Highland by XS Scuba's Lift Bag is manufactured from Durable Urethane Coated Nylon for strength and long life and is available in Red or Orange Colors. So don't be caught without one when you go diving. You never know what treasures you may find!