Diablo, 3-1/4" 18 TPI carbide T-shank jig saw blade for thick metal. Diablo's carbide jig saw blades deliver extreme durability and superior cutting life in thick metals ranging in thickness from 1/8" to 1/4". High-performance carbide strip provides an unmatched up to 50 times longer cutting life versus standard jig saw blades. The optimized blade design and perma-shield non-stick coating reduces heat and pitch build up for fast and effortless cuts. T-shank design fits all combo and most U-shank cordless and corded jig saws.