Diablo's Bi-Metal Reciprocating Saw Blades for Medium Metal with Full Contact Arched Design are specifically designed for maximum performance in metal cutting applications, including metal ranging from 1/16 in. to 5/16 in. The blade’s Full Contact Arched Design with ultra hardened cutting edge provides faster cuts in fewer passes, delivering up to 5X longer cutting life compared to standard bi-metal blades. An oversized 1 in. demolition body translates to straighter cuts with less vibration and chatter. Diablo's Perma-SHIELD® coating helps protect the blade from heat, gumming and corrosion. 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 performance Dual 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 corrosion 1" Demolition body for straighter cuts with less vibration.