[Features] ● Uses high quality chrome vanadium steel (SNCM20V). ●In order to ensure uniform and high-precision refining (heat treatment) hardness (HRC60°), we have adopted a completely non-oxidizing and decarburizing correction quenching method using a closed furnace instead of using a continuous furnace. ● You can rotate 360 ° by replacing the holes alternately. ●It can be tightened with about 4 times the normal force.
