- New and improved design
- Every other tooth is thinner for faster cuts
- New heat vent/expansion slot design reduces vibration for longer life and straighter cuts
- Construction grade carbide teeth for longer life
- Reinforced shoulder for added durability
- Fully hardened plate runs longer
![Irwin Marathon® Portable Corded Circular Saw Blades, 7 1/4", 18 Teeth, Carded #IR-14028 (5/Pkg) Irwin Marathon® Portable Corded Circular Saw Blades, 7 1/4", 18 Teeth, Carded #IR-14028 (5/Pkg)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/258168/363071/585-14030__46936.1595392198.jpg?c=2)