T-Lokā¢ Bone Marrow Biopsy Needles are designed to provide quality biopsies by entrapping bone marrow in the needle without altering the sample. Key Product Attributes: Unique cannula design provides outstanding quality specimens. Ergonomically designed twist-lock handle provides greater clinician comfort. Double-diamond stylet point easily penetrates hard bone. Innovative design provides an exceptional ability to capture and retain bone marrow specimens. Eliminates painful deflection technique to harvest a diagnostic quality specimen.