Induction Heater Inductor Coil Kits, Magnetic Mini Induction Heater Kit, Flameless Heat Accessories 8pcs, Heat Resistant Induction Heater Tool with Flexibility For Removing Rusty Bolts and NutsProduct Features 8 PCS COIL KIT This induction coil kit includes six most commonly used coils of different diameters and two free coils to remove rusty bolts and fits a wide range of applications. The diameter of the heating bolt ranges from 1 5" (5 mm) to 1 3 5" (40 mm). 8 pieces 2 x 1 1 5" (30 mm) coil, 2 x 1 3 5" (40 mm) coil, 2 x 2" (50 mm) coil; 2 x 29 1 2" (750 mm) free forming coils. LONG LIFESPAN Each coil can resist overheating and premature