Where an object is not turning around a pivot, the total
clockwise moment must be exactly balanced by the total
anti-clockwise moment.
It is like a see-saw
f the people are identical weights and sit identical distances from the pivot, the
see-saw will balance. This is because the total clockwise moment is balanced by the
total anti-clockwise moment.
For a spanner, to make it easier to turn, you can make
the spanner longer, or put more force.