In this video I cut through a metal bolt with a cordless Dremel rotary tool (old Model 800, 10V lithium, 35,000RPM). You can find cordless Dremel tool at Amazon:
https://amzn.to/2srTxRM
I use cut-off wheel #426, it’s a standard metal cutting disc that is reinforced with fiberglass for longer durability.
Post time: Jul-05-2017