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Subsequent treatment process:
Vacuum Heat Treatment: Compared with ordinary heat treatment, vacuum heat treatment has stronger stability and less deformation.
Liquid Nitrogen(The cryogenic process): makes the crystal more uniform.
Finishing: Silver Polished
We recommend using Punching Board (can be purchased here) with our Hollow Pricking Irons.
This design has been registered with the Intellectual Property Office (IPO) UK under Pro Atelier Plus LTD and The China National Intellectual Property Administration (CNIPA).
Inverse French Style Pricking Hollow Pricking Iron Stitching Chisel
440c stainless steel: High-carbon, high-chromium stainless steel by Hitachi Japan, excellent rust resistance, high hardness, wear resistance, and toughness.