5 Pack, 4" 14 TPI, Bimetal Reciprocating Saw 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°ree. Hook Angle For Fast Cuts Through The Toughest Materials, & Tough Flexible Body Resists Breaking, For Cutting In Heavy Gauge Metal, Hard Rubber, Fiberglass & Angle Iron.