The Power-Stud anchor, formerly known as the Rawl-Stud, is a fully threaded, torque controlled, wedge expansion anchor which is designed for consistent performance. It is available in threaded, rod hanger and tie-wire versions suitable for applications in solid concrete and grout-filled concrete masonry. The threaded version is produced in carbon steel and stainless steel to offer various levels of corrosion resistance depending on use.  The drill bit diameter necessary for prope installation is the same as the anchor diameter.