1. Size: 7"(180mm) & 8"(200mm) & 9"(225mm)
2. Material: Upper blade: 55# carbon steel
Lower blade: 55#carbon steel
Pivot bolt: 35# carbon steel
3. Heat-treatment: By advanced continuous mesh belt temper machines, whole-piece heat treatment with hardness:
Upper blade: 52-54HRC
Lower blade: 48-52HRC
Pivot bolt: 28-32HRC
4. Surface finish: fully machine grinding on blade, fine vibration rubbing on body
5. Handle: skid proof design