5 Pack, 6, 14TPI, Gold Reciprocating Blade, Designed For Thick Metal Cutting Lenox, Longer Lasting, Reinforced Tooth Design Titanium Coating Combine To Create The Longest Lasting Blade Ever, Shatter Resistant, BiMetal Blades Bend Resist Breaking Extend Blade Life, Cuts Faster, Specially Formulated Titanium Edge Improves The Wear Resistance Of The Teeth For Faster Cuts Throughout The Blade’s Life