Saw blade

A blade for a circular saw, comprising:

• a body of a generally circular shape, said body having a preselected blade thickness, said body having a peripheral surface having a preselected shape, said peripheral surface having a plurality of cutting teeth connected thereto for cutting in a cutting direction, said blade having a center arbor bore therethrough, said blade having an imaginary blade center point, said blade having at least three and not more than four identical J-shaped expansion slots therein, said J-shape expansion slots having an equal spacing therebetween about said peripheral surface, each said J-shaped expansion slot having a preselected opening width, said opening width being at least equal to said blade thickness, each said J-shaped expansion slot having a radial portion and an arcuate portion, said radial portion extending radially inward from said peripheral surface toward said imaginary blade center point for a preselected distance to a closest radial location, said arcuate portion starting at said closest radial location and arcing in said cutting direction, said arcuate portion having a preselected radius and an imaginary arc center point, said imaginary arc center point having a blade location between said peripheral surface and said arcuate portion and in said cutting direction from said radial portion, said arcuate portion having a J-shaped expansion slot closest location to said imaginary blade center point.