The Sentinel and Badger Drill Bits are engineered for safety and joint preservation for the patient through cartilage and soft tissue protection. The mono-fluted Sentinel Drill Bit design provides 270 degrees of smooth surface to protect the medial condyle from damage in medial portal approach drilling. The Badger Drill Bit's acorn style delivers aggressive front cutting edges with a smooth shaft design to protect the PCL in transtibial approach drilling.