Step drill STREND PRO SD41 4-12mm

Step drill bit - diameter range 4–12 mm, HSS steel material class 4241 (composition W 1.50–2.50 %, Mo 0.60–1.20 %, Cr 3.80–4.40 %, V 0.50–0.70 %), suitable for drilling into sheet metal, plastic and thin-walled materials, the conical shape allows gradual widening of the hole