The Power-Stud+ SD4 and Power-Stud+ SD6 anchors are fully threaded, torque-controlled, stainless steel wedge expansion anchors, which are designed for consistent performance in cracked and ...
Their chains were made much stronger by the invention of the stud, patented in 1819 by Brown and Philip Thomas, foreman of the chain-shop. Brown Lenox made all the Royal Navy's anchor chains until ...