OCGIG Spiral Groove Step Cone Drill Bit Cut Tool Hole Cutter 0_39-1_7710-45mm HSS 4241 Nitriding Black

Features: 1.3 sided shanks design in order to prevent slippage when in chuck. 2.Two flute design provides faster, smoother and cleaner cuts. 3.Each step is clearly labeled with the depth diameter in steps. Specifications: Color:Black Type: 0.39-1.77” / 10-45mm Surface coating: Nitriding Material:High speed steel 4241 Handle:Triangle round handle Total Blade Length:77mm/3.031” Bevel Height:3mm/0.118” Blade Length per Section:6mm/0.236” Total Shank Length:25mm/0.984” Shank Diameter:12mm/0.472” mm size:10-45mm(10,15,20,25,30,35,40,45mm) Inch size:0.39-1.77”(0.39,0.59,0.78,0.98,1.18,1.37,1.57,1.77”) Package Included: 1 x Step Drill Bit Notice: 1.Please allow slight deviation for the measurement data. 2.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. "