Diablo, 5 pack of 3-1/4" 20 TPI bi-metal T-shank jig saw blades for scroll cuts in wood. Diablo's bi-metal teeth jig saw blades are specifically designed for maximum precision and control in intricate curved cuts in wood. These high-performance blades feature an ultra-hardened cutting edge to deliver up to 5 times longer life than standard blades. The optimized tooth and blade design make effortless and clean finishes. T-shank design fits all combo and most U-shank cordless and corded jig saws.