Patent ID: 7371035

Claim:
A drill insert comprising: a drill insert body having a first end opposite a second end, a first face side opposite and parallel to a second face side, a pair of apertures formed through the face sides, and a first land side opposite a second land side, the first and second land sides formed between the ends and the face sides; wherein at least a portion of the first end of the drill body is a generally planar surface; wherein the second end comprises at least two main cutting edges formed transverse to each other and substantially parallel to the first and second face sides respectively, a web formed between the two main cutting edges, and a web thinning notch formed on either side of a chisel forming the web; wherein each web thinning notch forms a notch cutting edge adjacent to and radially inward from one main cutting edge of the at least two main cutting edges, wherein each notch cutting edge has a positive rake angle, wherein the positive rake angle is formed on each notch cutting edge without substantial weakening of the insert at the center portion thereof.