FeaturesScrew style anchor designed for lag boltsShort style preferred for harder masonryA 2-piece assembly made of two semi-cylindrical hollow sections interlocked at the top, allowing the shield to expand when in placeThe bore of the shield is tapered, has an internal thread and has a ribbed outer surface to resist backing outCan be used in solid or hollow base materials and is more resistant to temperature fluctuations and rust than other light duty anchors