close-up of two dirty hands, showing the wear and dirt from hard work

39aph39 arm background black bluecollar calloused carving closeup craft craftsmanship dedication detailed dirt dirty effort engineering environment exertion finger fingerprints grease grime hand handiwork hands hard industrious industry labor laborer limb machinery maintenance manual mechanic muscle nail oil palm perseverance person physical quail repair resilience rough rugged shoe shop showing skilled skin stains texture tools toughness tradesman two wear work worker working workplace workshop