Air Reciprocating Saw Blade, Primary Material Application Metal, Materials Aluminum, Nail-Embedded Wood, Plastic, Soft Metals, Wood, Blade Length 4 in, Metal Cutting Type Thin Metal, Teeth per Inch 32, Blade Thickness 0.035 in, Blade Material Bi-Metal, Tip Material Metal, Back Style Straight, Number of Cutting Edges 1, Cutting Edge Style Rigid for Straight Cuts, For Use With Saw Type Reciprocating Saws, Package Quantity 20