The PRO-Series Adjustable Barrel Mount Base is designed to install over existing vertical structure such as shoring walls,tank edges,parapets,or similar applications. When installed,the Barrel Mount Base is designed to support the rated loads for all standard Tuff Built Davits in a wide variety of safety at heights applications. This Base comes with built-in wrenches for tightening the clamp screws to eliminate looking for tools and over-tightening.