RUST RESISTANT & HEAVY DUTY: Our 2.5 inch Masonry Nails are made from Tempered Hardened Steel, which has been slightly oiled to resist rust. (Nail head is 1/2" wide, blunt end is 1/8" wide) UNMATCHED GRIP: Utilizing a tapered shank and 4-sided square design, these masonry nails offer superior holding power and maximum resistance to pull-out, keeping your project secure and in place. SHATTER-PROOF DESIGN: Our concrete nails feature a combination of a blunt wedge point and tapered shank to effectively minimize splitting in concrete. EASY TO INSTALL: The wide 1/2" flat head provides a substantial surface for hammering, allowing for effortless driving and secure placement of nails into concrete. HEAT-TREATED FOR EXTRA STRENGTH: Sandbaggy cut masonry nails are crafted from 10-gauge tempered steel for unmatched resistance to bending when used on hardwood or masonry surfaces. The tempering process ensures the nail's strength and ability to withstand challenging tasks. USE FOR A VARIETY OF APPLICATIONS: Utilize these 8D nails for securing wood to cinder block, mortar joints, brick walls, and fresh concrete in interior projects with ease and precision. CONSTRUCTION GRADE: Aligns to ASTM F1667, as applicable Need a trustworthy solution for attaching wood to concrete, brick, or cinder block? Look no further than this 2-1/2 inch cut masonry nail. Featuring a 1/8" blunt wedge point and tapered shank design, it minimizes splitting and offers superior holding strength. The 4-sided shank provides extra gripping ability and the heat-treated steel ensures long-lasting durability. With its large, 1/2" flat head, installation of these brick and concrete nails is a breeze. Each nail has a slightly oiled layer, making them more resistant to rust.