alloy
background
blank
clockwork
closeup
cog
cogwheel
construct
construction
copy space
design
dirty
frame
gear
grunge
grungy
hardware
head
heavy
industrial
industry
iron
mechanic
mechanical
mechanism
metal
metallic
old
part
plate
punk
retro
rough
rust
rusty
scratch
screw
sheet
shiny
steam
steampunk
steel
texture
tool
vintage
wall
weathered
worn