Cut masonry nails, with blunt point and tapered shank, are made of hardened steel. Hardened steel, a very hard steel type, has a hardness greater than HRC50. Blunt point and tapered shank are designed for minimal spalling and splitting during operation, so as to offer a greater withdrawal resistance than other nails. These nails are specially used for hard materials such as cinder block, concrete and masonry. The head can be squared or wrought to create a distinctive and decorative finishing surface. So cut masonry nails are very popular in new and historic projects. Tips: do not forget use safety glasses when driving any hardened nails.