Tired of blades that dull out fast or can't handle different materials? Grab this 5-pack of Irwin jigsaw blades. They're bi-metal blades, which means they combine high-speed steel (HSS) and high-carbon steel (HCS) – basically, they're super tough and flexible, perfect for demanding jobs. The \progressive tooth\ design is the key here: the tooth spacing changes along the blade, letting you cut through a bunch of stuff efficiently. We're talking metal (3.5-10mm thick), wood (even with nails in it, up to 90mm), particleboard, aluminum, plastics... you get the idea. They're 132mm long and have a T-shank, so they fit most popular jigsaws like Bosch, DeWalt, AEG, and Hitachi. Each pack comes with 5 blades, which is great value. Whether you're a DIYer tackling a home project or a pro on a job site, having a set of these versatile, durable blades on hand is always a smart move. No more switching blades constantly – these aim to do it all.