Ruko Step drill HSS, spiral fluted with cross grinding

Drilling range 4.0 - 30.0 mm. Next generation - With this robust tool, sheets can be centered, pre-drilled, drilled out, and deburred in one operation. The deeply ground and spiral-shaped flute provides absolute smoothness and high cutting performance. In particular, non-breaking chips are cleanly removed like with a spiral drill. This reduces the formation of built-up edges and cold welding on the cutting edges. The cone facilitates retraction when drilling through sheets. HSS: High-performance high-speed steel for drilling in easily machinable materials with a strength of up to 900 N/mm².