- 1.9mm / 1.6mm 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 Round handle features a large 9.5cm/3/8” diameter and is extremely light weight for maximum tactile sensitivity. **For further product information , please contact Chat Support**