CHUCK SET: This set includes /2, /4, and 12mm chucks, providing the versatility needed for various woodworking projects COMPATIBLE WITH MULTIPLE ROUTERS: Designed for DW616, DW618, and 1613 series routers, a for your existing tools METAL CONSTRUCTION: Made from robust metal, these chucks are built to withstand the rigors of professional use while maintaining performance For EASY REPLACEMENT: Easily replace worn or damaged chucks to keep your router functioning at its without complicated procedures SIZING REMINDER: Please verify your existing chuck sizes before purchasing to compatibility with your router model