- 1.9 mm / 1.6 mm diameters. - Precision-machined and hand-formed from high-carbon stainless steel. - Tips are then hardened and hand-polished to achieve smooth, scratch-resistant surfaces that produce accurate and smooth restorations every time. - DuraLite color rings handle has a large 9.5 mm/3/8” diameter and is designed to permit you to easily identify, organize and customize your instrumentation. **For further product information, please contact Chat Support**