DS1214BF5 Diablo 12 in Diablo Bi-Metal Recip Blade for Metal (3/32 in to 5/16 in) (5 pk) Thin / medium metals (3/32 in to 5/16 in)Diablos next generation reciprocating saw blades with Full Contact Arched Design are specifically designed for maximum performance in metal cutting applications. The blades Full Contact Arched Design with ultra hardened cutting edge provides faster cuts in fewer passes resulting in less heat build-up to deliver 5x longer cutting performance than those of standard blades. Full Contact Arched Design provides more working teeth within the material for faster cuts in fewer passes resulting in less heat build-up to deliver 5x longer cutting performanceDual tooth design features a double tooth configuration with small gullets for faster material removal and extra durability.Perma-shield coating protects the blade from heat, gumming, and corrosion1 in Demolition body for straighter cuts with less vibration.