Cartridge razors are shaving tools that use replaceable blades housed in a plastic cartridge. These cartridges typically contain multiple blades, allowing for a close shave with less irritation. The design often includes features like pivoting heads and lubricating strips to enhance comfort during shaving. Users can easily switch out cartridges when the blades become dull, making maintenance simple. Cartridge razors are popular for their convenience and effectiveness, appealing to both beginners and experienced shavers. They are widely available in stores and come in various styles, catering to different shaving preferences and skin types.