First Alert Hardwired 120V Ionization Carbon Monoxide and Smoke Alarm Specialty Plant Care 3/8" drive 6 point sockets:

3/8" drive 6 point sockets: sae 7/16"

Stud sensor with audio and video response

To further demonstrate our support

May be used indoors

I-Beams & Other Similar Metals

First Alert Hardwired 120V Ionization Carbon Monoxide and Smoke Alarm Specialty Plant Care 3/8" drive 6 point sockets:Carbon monoxide & dual ionization smoke sensor Separate visual and audible smoke and carbon monoxide indication to eliminate confusion Intelligent Sensing Technology for fewer nuisance alarms Smart 3 wire interconnect Quick Connect wiring harness for connection to AC power 85dB horn and 9V battery backup 2 silence features: Can silence the low battery chirp for up to 8 hours or temporarily silence an unwanted alarm Interconnectable with up to 18