Airmar 164WR-4 Transducer Housing Wrench

A single-handed wrench that holds the main thru-hull housing via the 'wrench flats' on the top of the housing to facilitate tightening of the hull nut. For B164, SS164 and SS264 thru-hull housings.

Use wrench 164WR-2 or 164WR-3 for the hull nut.