The Lenox 20576-800RG is the Master Grit carbide grit edge reciprocating saw blades that the super hard cutting edge easily cuts through abrasive materials that quickly dull standard tooth blades. The less aggressive cutting edge smoothly cuts through materials that standard blades would snag, chip, or otherwise damage. LENOX 20576800RG CG RECIPS 800RG 8 X 3/4 X 042 XG 2/PK