Rubis tempered tweezer tips bend back to their original position extending the life span of the tweezer.
Swiss P Carbon (120mm)
Swiss Nr 4 Carbon (115mm)
Swiss Sc (125mm) Sb (120mm) Carbon
Swiss 3c Carbon 110mm
Carbon steel is an extremely hard alloy (> 59 HRC) composed of C, Mn, and Si.
While Carbon ensures strong tips, it will nevertheless easily rust. This alloy is magnetic and cannot be sterilized.