A tool for assisting a user in removing machinery cutting blades includes an upper and a lower handle that operate and lock an upper movable jaw. A nozzle may be positioned adjacent an upper end of the insecticide extraction chamber for directing a water stream downwardly therefrom toward the mass of insecticide bearing bodies. The susceptor 12 is connected to high-frequency power supplies 20 and 46. A system for inspecting a roof includes a lift system and a remote computer for analyzing data.