Speed Slot 3084712X Hole Saw Extension, 1/2 in Shank, 12 in L, Hex Shank

New LENOX Bi-metal hole saws deliver up to 50% longer life with a proprietary tooth form 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.