What material is the best inside six corner wrench?
Inside the six angle wrench, the best material is S2, followed by 8660, the so-called CR-V material can only row old three, but also very practical, cost-effective, and then almost is a kind of medium carbon steel, low grade goods.
The EIGHT of SNCM+V in Japan is more suitable for the material of inner six angle wrench than S2, HRC 55-60 and has toughness
S2 material wrench hardness is highest.
