Variable tooth saw blade

A saw blade comprising:

• a flat circular disc having a peripheral outer edge;
• a center hole formed in the disc;
• a plurality of circumferentially-spaced teeth projecting radially outwardly from the peripheral outer edge;
• a cutting edge on each of the teeth;
• a first group of the cutting edges;
• a first circumferential width defined between each adjacent pair of the cutting edges in the first group;
• a second group of the cutting edges;
• a second circumferential width defined between each adjacent pair of the cutting edges in the second group and differing from the first circumferential width;
• a third group of the cutting edges;
• a third circumferential width defined between each adjacent pair of the cutting edges in the third group and differing from the first and second circumferential widths;
• a fourth group comprising at least one of the cutting edges;
• a fourth circumferential width defined as one of the distance between adjacent cutting edges in the fourth group and the distance between the at least one cutting edge in the fourth group and the adjacent cutting edge in the adjacent group;
• the fourth circumferential width differing from the first, second and third circumferential widths;
• a first circumferential space between the first and second groups;
• a second circumferential space between the second and third groups;
• a third circumferential space between the third and fourth groups;
• and
• a fourth circumferential space between the fourth group and the first group.