The Ramset White Nylon Anchor is suitable for anchoring into brick, concrete and cement. It features carbon steel construction and zinc-plated finish for excellent corrosion resistance. The pin drives into nylon sleeve providing friction hold against the wall of the hole. This mushroom headed anchor measures 6.5 mm Dia x 25 mm.It is ideal for fixing solid and hollow masonry materials. Nylon body offers insulation between drive screw and work surface. It can be hammered all the way into the hole without any pre-expansion.