The Burn-In Knife is a furniture and woodwork repair tool for melting and smoothing lacquer sticks, formulated to match different shades of wood, into damaged surfaces. Cordless. Compact and economical to use. Good balance helps make burn-ins easier. Easy to fill. Fast heat-up. Durable with no moving parts. Fill once with butane fuel for hours of use, 30 minutes on the middle setting. Comes with a flat burn-in blade, curved blade for leather repair is also available. Adjustable from 30 to 70 watts. Compare to the Mohawk Solderpro M900-3210 and Iroda Solderpro 70. This knife comes with the catalyst head and flat blade.