Starrett BU418 Bi-Metal Unique Unified Shank Multi Purpose Wood and Metal Cutting Jig Saw Blade, Regular Tooth, 0.040" Thick, 18 TPI, 5" Length x 3/8" Width -Pack of 5-

Starrett bi metal unique jig saw blades. Bi-metal unique - breakthrough technology provides stronger, longer lasting, faster cutting blades. This new technology joins two strips of high-speed steel wires to a backing steel in a solid phase, using the principle of solid-state diffusion bonding agent - totally different from traditional weld or laser bonding processes that rely on metal diffusion as the union agent at the interface. The proprietary (patent pending) solid-state diffusion process generates 170 percent more weld contact area compared to the existing bi-metal high-speed steels. The result is significantly reduced fracture and breakage at the HSS/backing material interface. Soon after initial use, the teeth develop a groove in the very thin center of backing material at the cutting edge. Multi-Edge Performance, as a result, the cutting stroke produces dual chips that are more easily removed from the cut. For applications utilizing coolant, more of it flows to the cutting surface. This is the Split-Chip Advantage. Lower cost per cut. Application material thickness: 1/8 to 7/8-inches. Teeth per inch: 18 TPI. Measures 4-inches cutting length by 3/8-inches width by 0.040-inches thickness. Set type: Wavy. Shank type: Unified. Regular tooth. Straight cut type.