Indoor & Outdoor Use. Will Not Rust. Made with Industrial Grade Vinyl Graphics Rounded Corners & Pre Drilled Holes for Mounting .040 Aluminum Grade Metal Made with the strongest industrial grade materials in the industry, our signs are digitally printed with professional grade vinyl graphics using UV resistant inks that withstand the harshest elements and environments. Signs have pre-drilled mounting holes and rounded corners. They are made to perform flawlessly for years in the roughest of outdoor weather conditions without deteriorating or fading and will also handle the most demanding indoor industrial environments around.