Precision US Steel Ring Ruler for flawless jewellery measurements.
The US Steel Ring Ruler delivers exact inner and outer diameter readings, ensuring every ring you craft meets exact specifications. Made from hardened steel, it resists wear and maintains accuracy over years of daily use.
Its clear, dual‑scale markings simplify measurement for both metric and imperial systems, reducing conversion errors and speeding up workflow on the bench. The compact, ergonomic design fits comfortably in hand, allowing precise positioning without slipping.