SwissTech Heavy Duty Drills HSS-Co 8% Cobalt TiN Coated. Heavy-duty drill used to drill steels with a tensile strength up to 1,400 N/mm2. Stainless steels, heat and acid resistant steels and phosphor bronze. TiN coating provides longer tool life. Point angle: 135°. Helix angle: Normal. Web thickness: Strengthened. Relief angle: Normal. Tolerance of diameter: h8. Supply unit. All diameters - 1 pce. Manufactured to DIN338RN.