Hitachi 725324 6-Inch, 18 TPI, Bi-Metal, Metal Cutting Reciprocating Saw Blades - 5 Pack 6-inch long reciprocating saw blade has a cutting depth of 3/4-inch with a thickness of .035-inches Made of high quality bi-metal Straight back for more stability and fast, straighter cuts 18-TPI blades come in a 5-pack Comes with a 30-day limited warranty 6" x 3/4" x .035" 18 TPI Bi-Metal Straight back for sheet metal and pipes with a wall thickness from 1/8" to 3/16" 30 day satisfaction guarantee and one-year limited warranty on parts and labor