PAX WrenchBuilt Different. Feels Different. The Pax Wrench is designed to tighten and remove the Pax Cap and Pax Collar with ease. It does the same job as our 3D printed wrench but with the feel, strength, and finish of a premium billet tool. Machined from 6061 billet aluminum, its solid, clean, and built to last. When caps or collars get tight from heat, pressure, or repeated use, this gives you the leverage you need without flexing or slipping. No shortcuts.