Lenox Gold, 5 Pack, 818GR, 8, 18 TPI, Reciprocating Saw Blade, Blades Are Shatter Resistant Because The BiMetal 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