Diablo's Bi-Metal teeth jig saw blades are specifically designed for maximum durability, longer life and clean top finishes in wood applications. These high-performance blades feature an ultra hardened cutting edge to deliver up to 5X longer life than standard blades. The optimized reverse tooth and blade designs provide effortless, splinter-free top finishes. T-shank design fits all combo and most U-shank cordless and corded jig saws.