The product is a 1/2" shank, 5/8" diameter tungsten carbide dovetail joint bit made by the brand Harfington. This router bit is designed for woodworking and features a dovetail style cutting edge. With carbide-tipped construction and 2 flutes, this bit is durable and efficient for creating precise and intricate joints in wood pieces. The dovetail router bit is a valuable tool for woodworkers looking to enhance the beauty and functionality of their projects.