a single bold black key silhouette against a yellow backdrop

deadbolt padlock deadbolts padlocks yellow backdrop background computer generated graphics illustrations isolated two three dimensional dimension jet black bold outline outlines outlined silhouette shape shapes shaped features featureless detail detailed details detailing texture textures surface surfaces opaque trace traces border borders single one key keys open close closed lock locks slot slots master skeleton notch notches duplicate duplicates duplication duplications fine grind precision engineered engineering machine machines machining grinder grinders