GT Step Drill Set For Stainless Steel

[Features]
· 9-step step drill bit applications: for drilling holes in stainless steel plates, thin iron plate, aluminum, etc.
· Cutting material thickness: iron plate 2 mm (approx.)
· Drill bit sizes: 2.0/2.5/3.0/3.2/3.5/3.8/4.0/5.0 mm
· 9-step step drill bit sizes: 4/5/6/7/8/9/10/11/12 mm
· Shank: hex shank
· Shank diameter: 6.35 mm
· Hardness: HRC63 to 66°
· Approximate step drill diameter / rotation speed (for general mild steel) (drill diameter [mm] / rotation speed [rpm]): 4/2,800; 5/2,200; 6/1,800; 7/1,600; 8/1,400; 9/1,200; 10/1,100; 11/1,000; 12/900
[Applications]
· Drill bit applications: for drilling holes in stainless steel, difficult-to-cut materials, general steel and light metals