The EZ DrillUtil is a drill chart specifically designed for simplicity and ease of use. Why use an application for a drill chart when its faster to just walk over to the actual chart?! EZ DrillUtil ensures this is not the case by providing an application that immediately loads into the screen youll need. Just enter in a thread size and you will be provided with the hole size and tap drill size for both Cut (75% thread) and Form (65% thread) operations. Click on the arrow in the lower right corner and the 2nd screen will provide the same function for National Pipe Thread sizes. Its simple, and most importantly, very quick to use. All comments and suggestions are welcome.