Whiteside 6631 Groover Replacement for 5990 1-5/8"LD, 5/16"CL (6631) is a high-quality router bit designed for precision cutting and shaping. It features a cut length of 5/16, allowing for deep and efficient material removal. It features a large diameter of 1-5/8, making it suitable for creating bold and defined profiles. This router bit is commonly used for creating decorative edges, precise joinery, and intricate detailing on woodworking projects. Whether shaping cabinet doors, crafting furniture components, or cutting joinery, it delivers professional-grade results with ease.