I need to use carriage screws with bolt heads through hole in a steel frame to
underside of new wood stair treads The screws will be m8 or 10 and 30mm
long. Is there something like an electric screwdriver to tighten them as I
will be working by touch only on the lower ones near the floor and bolting
them upward. I dont relish the thought of using an ordinary spanner on the 100
plus screws that will be needed

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