[rocqua]

They don't. The screwdriver isn't meant for that.

Point is "adjusted the spring for lighter back-force" would normally mean the max torque you can use is reduced (because the spring slips). They state the max torque you can use to indicate the effect of the trade-off.

The fact that you think that the max torque is still way more than is needed, is probably why they advertise this. The fact that max torque is way higher than needed means they did not trade off too much max torque to reduce the back-force.