MaxxMacro 54 Stainless Control Ruler Master 6061 Rust Proof comes fully assembled and ready to use. This product is 100% cross-compatible with the System 3R Macro OEM system. For setting angular positions and for centring MaxxMacro chucks. MaxxDesign Exclusive Features: 100% cross-compatible with OEM system Accuracy: 0.002 mm (0.00008") for precise centering and angular setup. Product Information: The MaxxMacro 54 Stainless Control Ruler 6061 Rust Proof is a high-precision alignment tool, 100% compatible with System 3R 3R-606.1 Macro Tooling. Designed for setting angular positions and centering Macro chucks, it features a ground hole for accurate centering and a 100 mm measuring length. With an accuracy of 0.002 mm (0.00008"), it ensures consistent and reliable setup in demanding machining environments. As with all MaxxMacro masters and gauges, it includes a Quality Certificate of calibration for traceability and confidence in performance.