The CER-EXT has a profile that makes it ideal for use in extremity bones. The k-wire is used with standard operating room drills, both manual and power. The enhanced features of the tip of the stylet and cannula facilitate penetrating harder cortical bone including the distal tibia. Its shorter length makes it ergonomically friendly for working in extremity locations and it incorporates patented technology that limits peripheral blood dilution and eliminates the need for centrifugation. This device is often used in conjunction with the CER-BN-116 bone dowel harvesting device and CF-G5 bone graft granules. Combining marrow aspirate with autogenous bone and a graft extender allows clinicians to fill boney defects using the patients own cells as the engine for bone healing. The combination of all three provide cells, signals and a scaffold; the building blocks for repairing bone.