This product ensures the safety of the entire procedure. It is supplied as a set including a spare trocar stylet, with ergonomic non slip handle. Benefits Proper Biopsy Depth: Proper biopsy depth determination is possible with Depth stop on cannula. Wearing Cutting Edges: Wearing of cutting edges is drastically reduced, even if it is utilized for distinct procedures. High Quality: It is a strong stainless steel, manufactured from high quality. Improves bone-marrow collection: Wide-side ports on cannula increases the collection of bone-marrow.