Ruko FlowStep Metal drill bit set 19 pcs. 1-10mm HSS-G (clear ground blades), lockable lightweight composite case. A very high quality metal drill bit set from the German company RUKO, especially for drilling steel, non-alloy and alloy steel (up to 900 N/mm2), grey, forged and moulded cast iron, sintered iron, nickel-silver, graphite, aluminium alloys, brass and bronze, PVC and wood materials. The blades feature a Flowstep tip - eliminating the need for pre-reaming. Precise centring of the tip ensures an efficient and truly round hole. Up to five times more durable and 50% faster drilling compared to a standard tip! Blades according to DIN 338, with Flowstep tip. Set includes blades 1-10 mm, 0.5 mm apart. All blades packed in a handy storage box, of course, to keep the blades in order.