CARBIDE-TIPPED CUTTING EDGES - Precision-ground to stay sharp longerFULLY HEAT-TREATED SHANKS AND BODIES - For durability and long bit lifeCONTROLLED DEPTH OF CUT - Minimizes kickbackINTERLOCKING CASE - Features a clear lid for easy identification, easy bit removal, and compatibility with other SKIL accessory cases and the SKIL storage system for custom configurationsCOMPATIBLE WITH - Routers mounted to a router table or handheld routers that accept ¼-inch shank router bits