Deburring chamfer tool

An internal deburring chamfer tool which is operably rotated about an axis of rotation, comprising:

• a main body including a working end for engaging a workpiece to be deburred, wherein the working end is of a conical shape and has a first cutting edge and a second cutting edge respectively extending lengthwise with reference to two slant reference lines which delimit the conical shape, wherein each of the first cutting edge and the second cutting edge slopes from a first end adjacent to the vertex of the conical shape to a second end adjacent to the base of the conical shape in a first length and a second length respectively, wherein the first end of the second cutting edge is further away from the vertex of the conical shape than the first end of the first cutting edge, and the second end of the first cutting edge and the second end of the second cutting edge are at substantially a same height of the conical shape,
• and wherein the second length is smaller than the first length, wherein the working end has a first and a second peripheral surface constituting an outer peripheral surface of the main body and an edge of the first peripheral surface defines the first cutting edge and an edge of the second peripheral surface defines the second cutting edge respectively.