Lenox metal cutting reciprocating saw blade. POWER BLAST TECHNOLOGY INCREASES BLADE LIFE High speed blasting along the cutting edge strengthens the blade to reduce breaks and increase durability LONGER BLADE LIFE & INCREASED VERSATILITY Patented T2 Technology reduces cutting forces on each tooth and optimizes chip removal to allow efficient cutting in the widest range of materials. Power Blast Technology refers to a high speed blasting process known as peening, which is applied to the tang and cutting edge of LENOX Bi-Metal Reciprocating Saw Blades to reduce breaks and increase durability.