Diablo, 5 pack of 4" 10 TPI bi-metal T-shank jig saw blades for fine finish cuts in wood. Diablo's bi-metal teeth jig saw blades are specifically designed for maximum durability, longer life and speed in fine finish wood applications. 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 designs provide fast, effortless and clean bottom finishes. T-shank design fits all combo and most U-shank cordless and corded jig saws.