"Norton diamond blades offer many times the life expectancy and much faster cutting performance than standard abrasive blades, resulting in less downtime and overall cost savings. Blades feature laser welded diamond segments for long life and durability. Chopper brand is rated at 60 to 70 times the life expectancy of abrasive blades. Recommended Use Cured concrete, Blades qty. 1, Arbor Size in. 1, Blade Diameter in. 18, Cutting Width in. 1/8, Blade Type Segmented, Cutting Styles Wet."