I have read few posts and there is a 3 type of shaft
- the one i use from RA is quench spring steel
- second cressi stainless steel but don't know if harden or not its cobber color
- third the stainless from pathos and teak sea which is white color
- their is a hardened alloy 17-4 ph stainless also
anyone can help to distinguish between these ,I want to have a spear won't rusted like RA and also have same hardness and density to not overpowered .