Long Life In Abrasive Materials - High-performance carbide cuts through hard materials like fiber cement, brick, tile, and fiberglass. Dewalt reciprocating saw blades are ideal for cutting abrasive materials like fiber cement, brick, tile, and fiberglass. They feature high-performance carbide particles on a flexible backing for fast, smooth cuts through hard materials without binding. The DW4844 Saw Blade has Long Life Abrasive Materials.