I have one of those hand held impact drivers that use different bits. You hit them on the head and the bit turns slightly under impact.I cleaned out the bit slots in the screws and sprayed with pb blaster. Them impacted and resprayed. Loosened all four screws on both sides on the trim piece in the doorway on the floor.I got most of them out with a screwdriver. A couple had crust on them so I had to unscrew them the last bit with vise grips. All out and ready for cleanup.---Jack
