You don't have to be a trained bloodstain analyst to use this template. Its purpose is to highlight the importance of bloodstains and to document them through microphotography. This template, which is specially die-cut from non-glare pressure sensitive stock, will stick to any wall, floor or ceiling. It has its own pre-imprinted scale, information blanks, and instructions. It's also available in a generic format for non-bloodstain photos. Sold in packs of 15. Has a cut-out area to “frame” the area to be photographed. Great for small objects as well.