accuracy
angle
background
black
blade
calibrated
centimetre
device
drafting
draftsmanship
draughtsmanship
drawing
gadget
gauged
gray
handle
illustration
implement
instrument
iron
isolated
kneepiece
lsquare
measuring
metal
metric
millimetre
number
plotting
right angle
ruler
scale
setsquare
steel
tool
triangle
white
worktool