Whiteside Machine Company has been a trusted name in the woodworking industry for over 50 years. Their Finger Joint Router Bit, part number 3390, is a high-quality tool designed for cutting applications. This router bit is made to fit most standard finger joint jigs and is perfect for creating strong, precise joints in your woodworking projects. The package includes one router bit and features a brand name of Whiteside Machine Company. It is a great addition to any woodworking toolkit and is sure to provide long-lasting performance. 1/2"shank 5/16 finger depth 1-3/8 large diameter.