This is a new racing tool that you should definitely use for machine assembly and maintenance. With a high-quality high-carbon steel tip bit and racing package with an racing red aluminum handle, we have achieved ultra-reasonable pricing that overturns conventional wisdom while maintaining quality that we can confidently recommend to all radio-controlled car users. Good quality tool that can meet the demands of expert users, but due to its pricing, it is the best product for beginners. We also have a lineup of 4-piece of hex / nut driver that matches machines using button head screws such as the YD-2 series, so if you purchase it at the same time as the kit, the assembly finish will be much better. High carbon steel is a very durable material and will stay with you for a long time.