This DIY Welding Practice Kit is used to install a fun mini kit.The working principle of this kit is to accelerate the metal rod by using the current force generated by the electromagnetic field in the electromagnetic system.This is a great DIY appliance kit, you be more familiar with electronic components and learn more interesting electronic knowledge. Electronic DIY kit for welding exercises, and also suitable for home education.Not only improve welding skills, you also become more familiar with electronic components and learn more interesting electronic products. Suitable for teens and adults, this set is stylish and practical, and is the for birthday, Christmas, Year or other holiday gifts. Do not touch metal parts with your hands when powering on.The completed project is a device that operates at high voltages.Although the energy is small, the insulated high-transparent acrylic shell provides its safety. Please discharge the energy storage capacitor before troubleshooting. The installation and use must be under the supervision of an adult It's DIY kits, needs to finish by yourself. Color:As Shown Material:plastic+metal Package Contents: 1set * soldering project Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.