The 2-1/2" diameter, two-thirds round design provides excellent visibility and permits installation over anchor rods up to 1-1/4" diameter. The markers are produced from high impact resistant PVC with ultraviolet stabilizers added for retention of color under U.V. conditions. Four sets of holes are located along the guard to permit flexibility of mounting positions. Two different attachment methods are available-bolted clamp assemblies or wire ties. The bolted clamp markers are supplied with three galvanized clamp assemblies which enable tamper resistant attachment to guy wire diameters 3/16" through 1/2" and to anchor rods up to 1-1/4" diameter. The wire tie markers are supplied with three wire ties for a fast, low cost method of marker attachment.