Features and Benefits:3/4" I.D. preformed coil for heating nuts up to 5/8"Heat and expand frozen, rusted, or thread-lock compound nuts with out the collateral damage from a flameUses high frequency magnetic fields to heat metal and only metal, induction heatOperates on 120 volts/1000 watts of power!Faster and safer than a torchEstimated 500 uses minimum. Heating a nut red hot will reduce the life of this coil. Other Mini Ductor Accessories available below:Mini-Ductor II Magnetic Kit MD-700Mini Ductor Master Heating Coil Accessory Assortment Kit 7/8" I.D. Preformed Heating Coil for Mini-Ductor Extened Long 7/8" I.D. Preformed Heating Coil for Mini Ductor Coil Kit for Mini-Ductor Includes 7/8" , U-Form, Bearing Buddy CoilsU-form Coil for Mini-Ductor IDIMD99-602 Customer Coil Maker 1 3/4" I.D. Preformed Heating Coil for Mini-Ductor 1 1/2" I.D. Preformed Heating Coil for Mini-Ductor 1 1/4" I.D. Preformed Heating Coil for Mini-Ductor 1" I.D. Preformed Heating Coil for Mini-Ductor Bearing Buddy Coil for Mini Ductor Mini Ductor Long Coil Kit IDIMD99-675Mini Pad for the Mini Ductor - Pin Stripe Decal Molding Graphic Remover