Man wearing white protective gloves https://www.rawpixel.com/image/528037/premium-photo-image-elderly-construction-worker-blueView licenseWorking on the construction of a pontoon at the Vought-Sikorsky Aircraft Corporation, Stratford, Connecticut. Sourced from… https://www.rawpixel.com/image/12240618/photo-image-person-wood-public-domainFree Image from public domain licenseOil roughnecks screwing one piece of drill pipe to another piece by means of a heavy pipe wrench, Kilgore, Texas by Russell… https://www.rawpixel.com/image/12112817/image-person-art-vintageFree Image from public domain licenseScrewing one length of pipe to another by means of pipe wrenches, oil well, Kilgore, Texas by Russell Lee https://www.rawpixel.com/image/12171112/image-person-art-vintageFree Image from public domain license