RT 100 S was developed for the complex machining of steel materials . It makes a strong impression with its high cutting values and consistently good hole quality. An especially stable and accurate cutting edge is produced thanks to the special micro-geometry . The extremely smooth surface finish of the RT 100 S web thinning and flute profile reduces the friction between drill and chip. The machining temperature is reduced and chip evacuation improved. Cutting forces are reduced. These tool features result in maximum hole quality and tool life .