Scranner

thingiverse

I designed this tool to remove stubborn screws that are hard to reach. The fit is snug, making the bit need some convincing to slide into the hole, but at least it won't slip out. This tool accepts a standard 1/4 inch screwdriver bit. I've put it through its paces by holding the handle in a vice and using mole grips to twist the bit. It takes significant force to make the bit spin freely.