First Alert 1046731 10-Year Battery Smoke Alarm with Slim Profile Design Brand_Iron Out Optimized geometry with black oxide

Optimized geometry with black oxide coating to cut faster and produce less heat

An Integrated Magnetic Nail Set Is Designed To Allow Users To Set Nails One Handed And The Asymmetrical Anti-Ring Claw Minimizes Ringing When Striking Hard Objects

Mounts on any 20 lb (pound) or 100 lb propane tank

They come under various brand names

First Alert 1046731 10-Year Battery Smoke Alarm with Slim Profile Design Brand_Iron Out Optimized geometry with black oxideThe First Alert SM210 10 Year Sealed Battery Smoke Alarm with Slim Profile Design is equipped with First Alert's Precision Detection advanced sensing technology and meets new industry standards. This slim profile smoke alarm is easy to install, and the 10 year battery means no battery replacements are required. First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and