We focus alot on what an individual can build and use in their home but as the Descent happens, there will still be the need for small machine shops to operate. Do it yourself tools then will be needed.
Here is an article on Pat Delany, who does alot of research on those hybrid tools.
"There may only be a handful of people in the world who have thought as deeply as Pat Delany has about making cheap tools. Delany, from Palestine, Texas, designs hand-powered tools made of recycled materials. His heavy-duty drills, lathes, saws and other tools can handle the same tasks as modern power tools, but they equip carpentry and machine shops in off-grid and impoverished communities. To achieve their low-tech precision, his designs fuse century-old technology, present-day scrapped auto parts, pipe, concrete, wood and a relentless commitment to the bottom line."
At the bottom of the article are links to plans and photos for those who want to try it themselves.