1. drive pins into the anchor body, expanding the anchor to create a tight fit.
2. Concrete Anchors use pre-drilled holes, they are installed using hand tools, usually with a hammer blow, to drive the pin into the anchor body, thus expanding the anchor to form a tight fit
3. have an anchor diameter equal to the hole diameter, mainly to facilitate the sizing of the hole
4. The washers on the anchor bolt hold the pin and guide it accurately during the drive installation process.
5. have a galvanized steel surface for an added layer of corrosion resistance.