New LENOX® Bi-Metal Hole Saws deliver up to 50% longer life* with a proprietary toothform that cuts common construction materials efficiently. A reinforced tooth design absorbs impact forces from obstructions and bind-ups while drilling for less tooth breakage. The SPEED SLOT staircase design allows for fast and easy plug ejection. Compatible with both quick change and traditional non-quick change arbors*. *vs previous generation LENOX® Bi-Metal Hole Saw drilling low carbon steel. *Excluding proprietary arbor systems that require adapters. For the range of diameters listed on packaging only.