These polyethylene staples with zinc plated nails are designed to offer fast and easy installation when securing most types of non-metallic cables. The zinc plated nails not only resist rust and corrosion but drive together for fast installation with a hammer while the recessed heads ensure minimum exposure and avoid snags. The smooth polyethylene saddle protects wire and will not rust rot or deteriorate. Use to attach all NM cable to joists framing and other wood installations. 1/2 Plastic Staples. 225 staples per jar. Secures Romex UF and other tyupes of non-metallic NM cable. Fast and easy to install - both zinc-plated nails drive together without splitting wood. Nail heads are recessed for minimum exposure. Smooth saddles prevent damage to insulation. UV-resistant polyethylene saddles will not rust rot or deteriorate.