Next, I use a 2.5" Holesaw as a facemill !!

The video demonstrates a creative and unconventional use of a common tool (holesaw) for a precise machining task, which appeals to a niche audience interested in DIY, engineering, and metalworking hacks. The visual of the process and the satisfying "Damn!!" finish likely contributed to its shareability.

The video shows a machinist using a 2.5" holesaw as a facemill on an aluminum block. The process involves a .020" depth of cut at 750rpm, resulting in a smooth finish on the metal.