accessory
alloy
bolt
caliber
carving
chuck
clamp
closeup
connector
cutter
detail
drilling
engineer
equipment
gear
gear manufacturing
hardness
heavy
holder
hole
industry
lathe
locksmith work
machining
measure
measuring tool
mechanic
mechanical engineering
metal
metric
motor assembly
nut
occupation
pipe
plumbing
precision
processing
production
quality control
rotate
screw
shiny
spiral
steel
technology
teeth
tool
tooth
turning
worm