Diablo, 5 pack, 3-3/8" 30 TPI bi-metal T-shank jig saw blades for thin metal. Diablo's bi-metal teeth jig saw blades are specifically designed for maximum durability, longer life and speed in medium metal applications ranging from 1/64" to 3/64" thickness. These high-performance blades feature an ultra-hardened cutting edge to deliver up to 5 times longer life than standard blades. A back taper blade design and perma-shield non-stick coating reduces heat and pitch build up for fast and clean cuts in metal. T-shank design fits all combo and most U-shank cordless and corded jig saws.