A putty knife, sometimes called a spatula, is a kitchen spatula-like scraper that features a flat blade with a sturdy handle, and the tool is used in many different construction and home repair projects. There are two different types of putty knives: , each type is suitable for a specific application. In some projects, a spatula can be used instead of a putty knife. A hard-blade putty knife is made of a sturdy metal blade that is a little thicker and less prone to bending. This is ideal to use on any job that requires a rigid tool. One example of a hard-bladed putty knife is only suitable for tasks that are scraping. The action of the scraper can help remove paint or wallpaper, or remove impurities from any smooth surface.

The second common type of putty knife is the flexible blade, this type of putty knife has a thinner blade than its hard-bladed counterpart, allowing the blade to flex a little when needed. Flexible blade knives are effective in tasks that require more of a scraping action, such as applying sealant or covering into dents or holes in a wall. In addition to the thin metal blade, this form of putty knife usually comes with There are plastic bodies and handles, which allow the tool to be used several times, and many discount retail hardware stores and paint centers will carry a line of putty knives. The tool itself is relatively inexpensive, although some hard blades made for long-term use will cost a little more. Simple to operate and very manual, putty knives are often found in tool boxes at home, putty knives are often used for home repair projects.