Iroda CT16 Catalyst Head and Flat blade combinationIroda Flat blade and catalyst combination for Iroda SP100,110,120,150, Wall Lenk LSP 110, Mohawk M900 3300. The catalyst head replaces the catalyst head that comes with the Iroda and Wall Lenk Soldering Irons so that a flat or curved blade can be installed making it a furniture repair burn in knife or is a direct replacement for the catalyst head and flat blade that comes with the Mohawk burn in knife M900 3300 and M900 M120. Flat blades and catalyst