Review on Hillman 371958 Anchor 2 Inch 10 Pack: Secure Your Projects with Ease by Brendan Thorpe

These anchors do not open easily and the threads break easily in a strong impact. I tried installing 4 of these and only 1 opened up and secured in the concrete shaft. The nut also sticks to the studs right out of the box. It only gets worse when you start hitting the anchor with a hammer. These are the worst concrete anchors I have ever used. You'd better glue the studs to the floor with epoxy.