Guidepoint tip traces around outlet boxes and can light . They consistently make the most precise cut possible with a router. This is just one more of the ToolPro line of professional drywall tools for those who make their living with their hands. 10-Pack of 1/8 in. high speed steel fluted bit. Piloted tip for plunge cuts into drywall. Downward spiral is designed to push dust into wall and away from you. Use with any high-speed rotary tool to cut-out can lighting or outlet boxes.