These iron tips are galvanized with iron and nickel which protect them from oxidation, featuring corrosion resistance.heat up to 480℃ and last for over 20000 solder joints with proper use.Since the tip is very sharp, it is suitable for craft production, for example, àgrave;Speaking of a machine failure, once the microswitch blew.of the small printed circuit board, you have found that the microswitch contacts are smaller than micro (smaller than a pinhead), or Solder in a narrow space also to review the tin bridge that emerges from the soldering of the chip.How about you buy this set and make your soldering easier Specification: Material: Copper Color: Silver Plating: Iron & Nickel (Finish) Outer Diameter: Approx.6.7 mm / 0.26" Inner diameter: approx. 4.0 mm / 0.16" Length: approx.43cm / 16.93" Package Weight: About 47g Model: 900M-TI Applicable to: 936, 937, etc.Temperature range Temperature: 200-480℃ Quantity: 10pcs/bag To store used iron tips Use a sponge to clean the iron tip.Wrap them with solder.Turn off the power and wait for them to cool.Put an iron pen on the iron shelf.