Lenox Lazer Hd Reciprocating Blade Applications: Copper Pipe & Black Pipe 1/16 to 1/4" Length: 6" Thickness: 0.042" Width: 1" Teeth Per Inch: 18 Strong, durable and long-lasting Unique blade geometry reinforces traditional weak areas, creating stronger and more durable blades Shatter resistant bi-metal blades bend and resist breaking, extending blade life Optimized performance - thicker (.042) and wider (1) blades minimize whipping for straighter and smoother cuts