bolt
boring
boring holes
chock metal
chuck
circle
construction
device
dirty
drill
drilling
equipment
hard
hardware
hole
industrial
industry
instrument
iron
machinery
machining
mechanical
metal
metal chips
metal scrap
metallic
metalwork
metalworking
mill
object
part
perforate
power
precision
rail
repair
rotate
round
safety
scrap
scrap metal shavings
screw
shavings
spiral
steel
steel pieces
swarf
technology
turning
work
workpiece