This is a unique reamer with a very steep taper. This steeper taper and shorter graphite reamer length is designed to make flaring small objects easier without the long point of the reamer bottoming out. (At the back of a short cup or foot for example.) The short line of reamers is also designed to be more durable at the small pointed tip. Since there is less thin material between the widest point of the reamer and the fine 3mm tip, the reamer point will last longer and withstand more abuse.