Lenox Gold, 5 Pack, 818GR, 8", 18 TPI, Reciprocating Saw Blade, Blades Are Shatter Resistant Because The Bi-Metal Technology Flexes & Resists Breaking, Long Lasting Blades Tuff Tooth Design Is Reinforced With Titanium To Cut Stronger & Last Longer, Designed To Attach With Unique Blade Geometry Which Positions The Blade For Optimum Cutting Performance.