ButtonLok Female Connection allows you to spin the noise maker in the vent and follow along vent to find disconnection. Goes silent if there is a break in the line, indicating where to cut drywall. Also useful in finding out where vent runs when deciding re-route location.
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.