I recently tested this product in my workshop, and I was extremely disappointed .As a result of my tests I determined that it did not live up to its advertised capabilities and was not effective in its intended use. The only positive aspect was its affordable price, but even that is not worth it given its poor quality..
Terrible quality, wrong geometry to cut really well, blue colored edge. soft due to overheating during the grinding process, there are also burrs on the cutting edge.
Pros
body diameter: 8 mm / 3/8 inch; Overall length: 50 mm / 2 in.