From the manufacturer Irwin Jack Hardpoint Tenon Saw 12 inch Irwin Tenon Saws offer a very fine toothing and a reinforced back which provides maximum stability ideal for all fine carpentry. About us Irwin Tools manufactures and distributes professional grade hand tools and power tool accessories worldwide for trade professionals who demand superior performance and durability on the job. For over a century, innovation has been the hallmark of Irwin tools. Beginning in 1885, with the development of the first Irwin Auger Bit, and progressing with the introduction of Vise-Grip Locking Tools, SPEEDBOR Flat Bits, MARATHON Saw Blades, and QUICK-GRIP Bar Clamps. From the beginning of our product development process to the performance of these products in your hands, Irwin is where you train, work, play and buy. This commitment is apparent in everything we do.