Zorlun 100mm 150mm Carbide Machine Reamer H-R-C60 Coated Spiral Groove Tolerance H7 Harened Steel Metal Cutter CNC Turning Hol(11x100x150-6F). Product Name : HRC60 Reamer--Sprial groove Extended handle;Number of blades :4 flutes / 6 flutes; Coating :Copper-colour NanoCoated;High precision:H7;Diameter : 2mm ~20mm; Overall Length : 100mm & 150mm Application : Turning holes;Edge : Negative Front Angle Design,Adopt large core diameter to enhance the rigidity of the tool and make it stable in cutting and chip removal. Material : Tungsten Steel Materials;Chamfer : Enhanced vibration resistance and cutting speed of milling cutters. Easy to operate. Sprial flute :Sprial flute design is more conducive to removal of chips, avoidance the tool from overflowing and greatly,improving the surface effect. Package included:1pcs Farbe:One Color