The McKesson Prevent Newborn Heel Incision Device is Specifically engineered for newborns, the stainless steel blade makes small, precise incisions in a gental, sweeping arc instead of puncture for reduced bruising Features contoured-finger design and a single direction of safety tab and trigger function for a steady and stable grip in a convenient, single-handed operation Features tapered contact surface for better visibility of site location Extra thin steel blade to achieve the finest, cleanest surgical incision Consistent depth (1.0 mm) and length (2.5 mm) of incision provides excellent blood flow and precise incision for adequate sampling, reducing need of re-sticking Permanently retractable blade with integrated safety tab is fully shielded before and after use to minimize possible injury or reuse Yields optimal results when used with the McKesson Infant Heel Warmer (MFR# 59-45HW) to increase blood flow to the heel Disposable. Sterile