the blade characterized as substantially planar, the blade defining a plane of symmetry relative to the blade;

the blade comprising first and second sharp edges, wherein the first edge and the second edge are straight, the first edge and second edge defining a first angle, the first edge and second edge, if extended, having lines of intersection at a first intersection point;

the first and second sharp edges symmetric relative to the plane of symmetry;

the first and second sharp edges nearing each other and defining a tip area therebetween;

each of the first and second sharp edges defining a cutting bevel of between 17 and 30 degrees;

the tip area characterized by third and fourth sharp edges, the third and fourth sharp edges symmetric relative to the plane of symmetry;

the third edge adjacent to the first edge at a first inflection point and adjacent to the fourth edge at the tip area; the fourth edge adjacent to the third edge at a second intersection point and adjacent to the second edge at a second inflection point;

wherein a second angle defined by the first inflection point, the second intersection point, and the second inflection point is between 40 and 65 degrees;

wherein the second angle is greater than the first angle;

wherein the second intersection point lying between the first intersection point and the blade;

the first edge and the second edge and the third edge and the fourth edge each having a length;

each of the first and second sharp edges extending at least an inch in length;

the length of the third edge characterized as between ⅓ and 1/7 of the length of the first edge; the length of the fourth edge characterized as between ⅓ and 1/7 of the length of the second edge;

and each of the third edge and the fourth edge defining a penetrating bevel of between 20 and 35 degrees.