vernier caliper with screw, nuts and bolts

accuracy aged background bits bolt build caliper chrome circle closeup collection construct construction copper cross design detail dirty element engineering equipment exact fastening gray hardware head inch industrial industry instrument iron machine macro measure measurement measuring mechanic metal metallic meter micrometer millimeter millimeters nails nobody number nut old oval part precise precision repair rivet rule ruler rust rusty scale set shiny silver slide slot stainless steel technology texture tool vernier vintage white width work workshop wrench