Power-Stud+ SD1 Anchors are fully threaded, torque-controlled, wedge expansion anchors designed for concrete applications. Suitable base materials are normal-weight and sand-lightweight concrete, concrete over steel deck, and grouted concrete masonry. This anchor carries various DOT approvals including Caltrans’ listing for Stud Mechanical Expansion Anchors. Zinc plating offers moderate protection against rust and corrosion.