These heavy-duty drywall cut-out bits have a 3/16 in shaft that is sure to hold up longer than the standard 1/8 in cut-out bit. They consistently make the better cut possible without running out on you. This is just one more of the Toolpro line of professional drywall tools for those who make their living with their hands.Two-pack of high-speed steel fluted bitPiloted tip for plunge cuts into drywallDownward spiral is designed to push dust into wall and away from youUse with any high-speed rotary tool to cut-out can lighting or outlet boxes