set of industrial metal alphabet letter s, t, u 3d

abc aged alloy alphabet aluminum art background black bolt chain characters chrome cog cogwheel construct dark design detail dirty element figure font garage grain grunge grungy hardware industrial industry iron lead letter letterpress material metal metallic natural nature nut old paint pipe plate press print repair retro robot rust rusty scratch screw set shiny sign silver steel symbol text texture tool type typeset typographic typography vintage weathered zinc