... .None,HRC40 Anti-magnetic Anti-acid ST-12 Precision Circuit Board TweezerStainless steel tweezers, anti-corrosion refined. Better strength, flexibility, ... Antimagnetic, anti-acid, anti-corrosion. Flexible and durable, they can reduce fatigue overtime.TS-10 Tweeze (standard type): used to solder ... is more powerful than the standard, when the circuit board it will not bend, components will not fall.TS-13 ...