The Bedford Guide Wire Hard Bone Biopsy Kit is the perfect tool for performing hard bone operations. The kit is available in 11 gauge and two lengths (10 and 15 cm). Moreover, the complete set includes a guiding rod which is anchored into the cortex, a cannula which is placed over the rod and through the soft tissue, a drill which replaces the cannula to penetrate dense cortex, a 13 gauge biopsy needle with trephine tip and an ejector pin.