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 angle tubing and metal ranging between 1/16" and 5/16" in thickness. The blade’s oversized design with an ultra-hardened cutting edge provides faster and more rigid cuts in fewer passes. Diablo's Perma-SHIELD® non-stick coating protects the blade from heat buildup. All combined benefits provide up to 5X longer blade life compared to standard bi-metal 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 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.