Put together ladders for NHRA Drag classes that use a Pro Ladder for up to 16 cars. Can also be used for your own Practice Tree events. Has the feature to download and paste in a qualifying order, automatically creating a ladder. Also includes blank printable ladder sheets to bring up to the lanes with you! Just enter the number of cars, allowing you to create different scenarios. Looking to qualify in a certain spot on the ladder? Just enter where you want to qualify, the ladder will tell you what ET you need to run! No need to do any math or waste time writing names in. Microsoft Excel required.