aluminum
backdrop
background
banner
blank
bolt
closeup
concept
construct
construction
design
detail
dural
element
frame
gray
grunge
hardware
head
industrial
industry
iron
isolated
material
mechanic
metal
metallic
old
panel
part
pattern
photo
plate
postcard
rivet
riveted
rivets
scratch
screw
shabby
sheet
shiny
signboard
steel
surface
texture
textured
tool
vintage
work