Ruko Step drill Drilling range 4 - 12 mm HSS-Co5 spiral fluted Number of flutes 2 Number of steps 9

The step drill with specially developed FLOWSTEP® technology allows for a seamless transition between different diameters. Each individual step features a specially designed back taper that guides the step drill smoothly and precisely to the next step after drilling through each one. This results in a noticeably smoother and more controlled drilling process. The deeply ground and spiral-shaped flute provides absolute stability and high cutting performance. In particular, non-breaking chips are removed cleanly, similar to a spiral drill. This reduces the formation of built-up edges and cold welds on the cutting edges. The cone shape facilitates retraction when drilling through sheets.