Diablo’s bi-metal teeth jig saw blades are specifically designed for maximum durability and longer life in highly abrasive laminate applications. These high-performance blades feature an ultra-hardened cutting edge to deliver up to 5X longer life than standard blades. The optimized tooth and blade designs provide fast, effortless and clean finishes. T-shank design fits all combo and most U-shank cordless and corded jig saws. Ultra-hardened cutting edge for up to 5X longer life than standard blades Optimized tooth design for fast, clean cuts T-shank design fits all combo and most U-shank jig saws Maximum performance in cordless and corded jig saws