Features:* Solder tips are suitable for soldering at lower temperature.* Good thermal conductivity, fast heating, long service life, anti-static. Suitable for welding and repairing small components under high precision.* Bright without pollution, anti-corrosion, durable and long service life.* Lead-free, environmentally friendly. It has high safety and stable operation.* Type B: the iron solder drill has no directionality, and the entire front end of the soldering iron can be soldered. Suitable for general soldering, no matter what size of solder joint, type B iron solder drill can also be used.* Type D: welding with tip part. It is suitable for soldering environments that require a large amount of tin, such as large soldering areas, thick clamps, and large solder inserts.* Type C: use the chamfered part of the front end of the soldering iron soldering iron drill bit, which is suitable for soldering that requires a large amount of tin. 3C type iron solder drill, suitable for soldering resistors, diodes and other components.* K type: use knife-shaped parts for welding, can use vertical or pull welding, this is a multifunctional iron soldering drill. Suitable for SOJ, PLCC, SOP, QFP, power supply, grounding components, correction solder bridges, connectors and other welding. Specifications:Product Name: Soldering Iron Drill Material: Copper Color: Silver Model: B, C, D, Compact Power: 30W, 40W, 60W Length: (Approx.) 64-70mm Suitable for: Welding Quantity: Set of 4 PcsPackage Contents: 4 × Soldering Iron Drill Note:1. Transition: 1cm=10mm=0.39 inch.2. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.3. Please allow slight manual measurement deviation for the data.