The Airmar 175WR-4 is a single-handed housing wrench designed to grip the wrench flats on the top of a thru-hull transducer housing, holding it steady while you torque down the hull nut. Pair it with wrench 164WR-2 or 164WR-3 for the hull nut. Note that the housing design for compatible transducers changed in June 2012 — this wrench fits the post-June 2012 updated housing with an internal width of 2-3/4". For older housing designs, use the 164WR-4 (internal width 2-7/16") instead.

Specifications:

• Single-handed operation grips thru-hull housing via wrench flats on top of housing
• Internal width: 2-3/4" (fits post-June 2012 housing design)
• Use with hull nut wrench 164WR-2 or 164WR-3
• Compatible transducers: B164, B175, SS164, SS264
• For pre-June 2012 housing designs, use 164WR-4 (internal width 2-7/16")