Clean, straight centering ring installation is the foundation of a great flying rocket. The Centering Ring Aligner Tools are designed to help builders achieve precise alignment every time, resulting in stronger assemblies and more reliable flights. Designed for Accuracy and Versatility These tools work seamlessly with thick green centering rings, laser cut rings, and engine hook retainers. By holding rings square and flush during glue up, they help ensure motor mounts stay straight and properly seated. More Than Just a Centering Ring Tool Beyond centering rings, each aligner doubles as a reliable guide for tube marking, fin alignment, and other detailed layout tasks. This added versatility makes them a go to tool throughout the entire build process. A Must Have for Any Workbench Offered in five popular sizes, these aligners support a wide range of rockets, from basic kits to advanced custom designs. If you value clean builds, consistent results, and a smoother building experience, the Centering Ring Aligner Tools belong in your toolbox.