Atoplee 9pcs B Type HSS 120&deg; Center Drill Combined Drill & Countersink Lathe Tool Set Material: HSS ;Edge quantity: 2 edges The angle of center hole outer end: 120 degrees Flute diameter(mm):1,1.5,2,2.5,3,3.15,3.5,4,5; Shank diameter(mm):6,6,8,10,10,10,10,14,16mm Full length(mm):45,45,49,55,55,55,55,62,70mm; Flute Length(mm) :1.3,2,2.5,3.1,3.9,3.9,3.9,5,6.3mm Package Included: 9pcs B Type Center Drill Bit