The confusion over jig saw blades and sabre saw blades can be traced back to Black and Decker IIRC. Some decades ago B&D made a sabre saw but it was called the B&D Jig Saw. With a lot of marketing, making millions of sabre saws that are labeled jig saws the names are interchangable now even though the two tools are different. And for those of you who are not tool inclined, a saber saw is a hand held tool that has a blade about three inches long that will fit into an altoids psk (i think it will fit i haven't tried it), a jig saw is a bench top tool that uses a very fragile five inch long blade that is held in place on both ends.