Copper soldering tips are suitable for lower temperature soldering. There are 15 types of soldering tips in this set and you can choose the proper one for different soldering needs, for example, shape b all-round type which can be used from any direction and is easy to hold at any position, possible to solder any surface from small to large; and shape k type has a shape like a knife and is capable of soldering by applying the tip in 3 ways: line, face and point, it is used for soldering at narrow pitches, correction of bridging and drag soldering. Get this set of tips and make your soldering work easier. Features: These tips are made from copper, easy to tin and diamagnetic, suitable for lower temperature soldering. There are total 15 types of soldering tips in this set and you can choose the proper one for different soldering needs. Don't leave your iron running for hours and hours if you are not using it. This can make the tip get black oxide cover. Try to tin the tip as it heats. If you leave it on too long or run it too hot it will burn off the solder and go black again. These soldering tips are suitable for 936, 937, 938, 969, 8586, 852D soldering stations. Specifications: Material: Copper Length: Approx. 42mm / 1.65" Outer Diameter: 6mm / 0.23" Inner Diameter: 4mm / 0.15" Temperature Range: 200~480 Shape: K, B, I, SI, SK, 1C, 2C, 3C, 4C, 5C, 0.8D, 1.2D, 1.6D, 2.4D, 3.2D Quantity: 1pc each(total 15pcs) Suitable for: 936, 937, 938, 969, 8586, 852D soldering station Package Includes: 15pcs x Soldering Tips