164WR-2 Transducer Hull Nut WrenchA single-handed wrench to tighten the hull nut on B164, SS164 and SS264 housings.You can use wrench 164WR-4 to brace the housing when using this wrench.For use with: B164 SS164 SS264; - cis2:mm5mnJlm -Specifications: Type: Tools; Box Dimensions: 1"H x 6"W x 11"L WT: 0.85 lbs;