Starrett Unique Bi-Metal Jigsaw Blades are compatible with virtually all jig saw machines due to their unified shank design, providing maximum grip and stability. These blades are engineered using the highest quality bi-metal with Starrett's unique saw technology, making them last 25% longer than competitor blades. They feature tapered ground teeth with multiple cutting edges and a split chip advantage, ensuring faster, smoother, and more precise cuts. The blades have 170% more weld contact area than standard bi-metal blades through a unique solid-state diffusion bonding process, preventing tooth breakage and fracture. With a constant pitch of 6 TPI and a cutting thickness of 30-45mm, these blades are ideal for fast straight cuts and can easily cut through different types of wood.