The Vevor induction heater coil kit includes 8 pieces with seven commonly used preformed coils and one free-forming coil for a wide range of heating applications. These flexible, heat-resistant coils are designed to help remove rusty bolts, nuts, and other metallic hardware more easily. Each coil is built for durability and long service life, with insulation and abrasion-resistant coating for added protection. The electroplated construction helps resist oxidation and supports efficient contact during use. This kit is made for use with an electromagnetic induction heater.