Laser Centering Device For Factory-Built Chimney Installations is a reliable way to mark exactly where to cut the hole in the ceiling for stove pipe above a stove. Fit this device on top of the first piece of pipe or stove collar and press the button. The centering device projects a red laser beam onto the ceiling. Where that beam hits the ceiling is directly above the pipe and perfectly centered. You can drill your hole there with confidence. Works on 4", 6", and 8" pipes.
WARNING: Carcinogens: This product can expose you to chemicals including Lead, which is [are] known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.