Esepacially when going into plastic, once the head begins to seat I'll just geat a light grip on the driver with my fingertips and twist with my fingers instead of twisting at the wrist. Provided the head looks fully seated to me if I'm not able to continue to turn it with my finger tips than it is good enough. I know if I grab it with my hand I could probably get another few degrees of turn in and still be fine, but I don't want to risk stripping out the hole...sometimes that can happen too easily.