A dado blade is a specialized type of saw blade used on table saws to create wide grooves or dados in wood. It consists of two outer blades and one or more inner chippers, allowing for adjustable widths. This setup enables woodworkers to make precise cuts for joinery, such as in cabinets and furniture. Using dado blades can significantly speed up the process of cutting grooves compared to using a standard blade. They are particularly useful for creating strong joints, as the wider cuts provide more surface area for glue, enhancing the overall strength of the assembly.