Induction Innovations MD99-650-FREE Mini-Ductor Standard Coil Kit 8-Piece

The Induction Innovations MD99-650 Mini-Ductor Standard Coil Kit is a professional-grade accessory set designed for use with the Mini-Ductor® Series induction heaters and the Inductor® Series U-555. This 8-piece preformed coil kit harnesses the power of high-frequency induction heating to safely and quickly loosen seized, rusted, or thread-locked nuts, bolts, and metallic fasteners — without open flame, harsh chemicals, or collateral damage to surrounding components.

Induction heating works by generating a precise, localized electromagnetic field that heats ferrous metal directly. This means the fastener expands while surrounding rubber, plastic, and painted surfaces remain unaffected — making it a significantly safer and faster alternative to a torch in automotive, industrial, and powersports applications.

Kit Contents (8 Preformed Coils):

• One 1-3/4" ID x 8.75" Long Preformed Coil (MD99-607)
• One 1-1/2" ID x 8.5" Long Preformed Coil (MD99-608)
• One 1-1/4" ID x 8.25" Long Preformed Coil (MD99-609)
• One 1" ID x 8.25" Long Preformed Coil (MD99-610)
• Two 7/8" ID x 5" Long Preformed Coils (MD99-601)
• One 3/4" ID x 4.5" Long Preformed Coil (MD99-611)
• One 7/8" ID x 9.5" Long Preformed Coil — Extended (MD99-605)

Key Features:

• Heats and releases seized fasteners up to 1-1/2" in diameter
• All coils are plated to resist oxidation and ensure consistent electrical contact
• Flexible coil design — can be bent or shaped to reach recessed or hard-to-access fasteners
• Each coil is rated for several hundred uses or more with proper care
• Compatible with the Mini-Ductor® Series and Inductor® Series U-555 induction heaters
• No open flame — eliminates fire risk near fuel lines, hoses, and wiring
• Ideal for automotive repair, collision shops, heavy equipment, marine, and powersports maintenance

The MD99-650 Standard Coil Kit covers the most common fastener sizes mechanics encounter, making it a versatile all-in-one coil solution for professional shops and serious DIYers. Alternate part reference: MD99650.