5 Pack, 6″ 6 TPI, Bimetal Reciprocating Blade, Reinforced Teeth For Increased Durability, Anti-Stick Coating Reduces Friction, Matrix II Steel With 8% Cobalt For Maximum Durability, Raker Teeth Minimizes Vibration, +5&degree. Hook Angle For Fast Cuts Through The Toughest Materials, & Tough Flexible Body Resists Breaking, General Purpose Blade For Fast Cutting In Wood.