NAILS CASE HARD CUT #8 50-LB.This box of nails contains hard-cut nails with hardened steel and blunt ends that help reduce fragmentation during penetration. They are excellent for use when attaching wooden members to fresh concrete and cinder block walls. In addition, they are heat-treated to increase strength and fluted to pass through the masonry without cracks. One of the advantages is that, unlike wire masonry nails, these offer better pullout resistance.