Cobaltima - the perfect combination of stength and durability. Superior to the best stainless steel, these tweezers and forceps have points insensitive to fatigue that maintain their elasticity. The hardness of the points is progressive; reaching its peak in the depolyment-zone where we have measured a Rockwell C hardness of 63/64 for model 5-CO. The edges are rounded to prevent marring and nicking of small wires. The handles are fluted for better gripping. The tweezer itself is only 1mm thick instead of 1.5mm, which makes them much easier to close. They are heat resistant to 500 degrees C (932F) and have excellent corrosion resistance.