The screwdriver takes advantage of how levers work when used to pry paint caps. The greater the distance from the power point to the fulcrum, the more labor-saving, so the long screwdriver is more labor-saving than the short screwdriver.
A screwdriver takes advantage of the working principle of an axle when it is used to turn a screw. The larger the wheel, the less effort, so using a thick-handled screwdriver is less labor-intensive than using a thin-handled screwdriver.
