8d X 2-1/2 In. 9 Ga Hardened Steel Fluted Masonry Nails (3850 Ct., 50 Lb.)

For fastening furring strips, floor plates, and partition walls. Fluted shank. Hardened steel. For best results drive nails 3" or more from edge of masonry or block allowing 3/4" penetration. Safety glasses recommended when driving hardened nails. 5/16" head. 9-gauge.