Putty trowel is a hand tool with a thin, flexible blade and an ergonomic handle, used for applying, spreading, and smoothing putty, joint compound, or other materials. Its primary purpose is surface preparation, including tasks like filling cracks and holes, smoothing plaster and drywall, and scraping away old paint or wallpaper. The tool's design allows for precision and efficiency in achieving a smooth, professional finish on various surfaces like brick, concrete, plaster, and drywall.