Precision steel drill for general, comprehensive applications in steel and cast iron up to 850 N/mm². 20% less feed force, faster feed rate and less effort compared to conventional drills Optimized cross-thinning Highly precise drilling without centering, even on curved surfaces Optimum cross-grinding Ideal for creating core drill holes Highly precise tip grinding for precise drilling Removal of coolants excellent adhesion and lower tendency to build up Evaporated surface Note 13.0 mm diameter drill bit is shaved to 12.7 mm diameter; See introductory tables for drill bit/material selections;