This spanner wrench is required to remove the access cover to change the lithium battery in the Dukane DK120 / DK140 and ELP-362D type Underwater Acoustic Beacons. Reference P/N 810-325 | Dukane

Accommodates a 1/4″ drive ratchet / screwdriver to properly remove and install the serrated nut on French manufactured switches (normally marked with a bullseye on the toggle). These types of switches are found in Dassault and Airbus aircraft (Airbus helicopters and A320 family fixed-wing). Comes phosphate coated. Switch, nut, and screwdriver not included.