Tell us about yourself!
10,000rpm ... you could step the speed down to say 6k or 5k and also to 2.5k or even 1krpm
A simple hacksaw blade will make you able to cut most metals
Other then the few tools he used(drill,counter sink,pliers, and the lighter), which none of which are needed, the technical definition of a knife is a "cutting implement". So technically he made a knife without tools. Handles are truly optional.
The cement (curb)