Package Included: 29pcs：as the picture 42pcs：as the picture 71pcs：as the picture Specification: Material: Plastic + Brass + Steel Power:15-60W Operating Temperature:0-40°C Temperature Range: 200°C-450°C(392°F-842°F) How to use: 1.Choose a tip you like and install it to the device; 2.Wait 3-5 minutes for it to heat up; 3.Start drawing on the wood surface with it; 4.Start burning the desing on the wood surface Notice: 1).Do not touch the tip or the soldering iron when it is still hot to avoid burns or injuries; 2).It is normal that the product produces smoke when used. Suggest use in a well ventilated space; 3).Please let it rest for a while after continuous using for 30-45 minutes; 4).Please wearing a work glove and waiting the temperature drop down then replace metal tips.