5 Pack, 6", 6 TPI Demolition Reciprocating Blade, Matrix II Steel With 8% Cobalt For Maximum Durability, Tough Flexible Body Resists Breaking, Reinforced Tooth Design For Increased Durability & Raker Teeth Minimize Vibration, Plus 5 Degree Hook Angle For Fast Cuts Through The Toughest Materials, For Demolition Work & Cutting Nails.