Made of rigid, 3/16” thick plastic, our revolutionary ConeBoss Signs help you convert a traffic cone into a signpost. Injection-molded Cone Sign for construction fits snuggly over most common size traffic cones. No need to pinch the cone to apply the sign. If you want to install the ConeBoss Sign permanently on the cone, just screw the sign into the cone using the two little holes provided. This would also ensure the signs remain more stable in winds.