Parallel-Extending in the
same direction and at the
same distance apart at
every point so as never to
meet.
Webster’s New World DictionaryCombination Square
A combination square is a great tool for the woodworker. It can do
many of the same jobs as the speed square and then some. What’s really
different about the combination square is that the ruler on the square is
moveable. Loosening a knob on the square
allows the ruler to slide to the measurement
you need. You can use the combination square
to draw a line that isparallelto the edge of a
board. This can be very useful when you need
to cut a board down the length of it and you
need a straight line to follow.