Strictly Ceilings is pleased to offer hardened tension nails used every day by our professionals. This nail is much stiffer and stronger than any nail of this length and is specially designed for wall angle installations while installing a suspended ceiling. These nails work excellent for nailing wall angle onto wood studs, plaster, mortar joints, and concrete block. This nail is designed to penetrate almost all substrates except poured concrete, brick and some newer, less-porous concrete blocks. Applications which involve the hardest subtrates, use the 3/4" Hardened Nail.