Mini Ductor II The Mini-Ductor is the professional's choice handheld, flameless torch and leverages the power of Invisible Heat to heat ferrous metals in seconds. Using high frequency magnetic fields, the Mini-Ductor releases corroded or frozen hardware and other metallic components from corrosion and threadlock compounds – all without the collateral damage normally associated with torches. Using one of the included coils that can flex around corners a flame cannot, the Mini-Ductor heats a 3/4 nut red hot in 15 seconds MD-700