Have this PRO-FIT 1-1/2 in. (4D) Brite Fluted Masonry Nail delivered to your job site. Coating: Bright finish for interior use. Code: Aligns to ASTM F1667, as applicable. Applications: Designed for use in concrete or masonry, including attaching furring strips and floor plates to uncured concrete. Head Style: Flat head offers a large striking surface for easy drive connection. Shank Style: Fluted shank offers vertical threads to minimize cracking when driving into cinder blocks, mortar joints, and other masonry applications. Point Type: Diamond point starts fast and drives easily. Length: Nails are 1-1/2 in.