Heavy Cast Square-Drive Service Wrench / Spanner Tool - Used

Heavy cast square-drive service wrench / spanner tool. Application: purpose-built service tool with a large square drive pocket and open jaw — suitable applications may include marine shaft/prop nuts, rudder stock nuts, large valve stems, or heavy equipment adjusters (application not confirmed; no manufacturer markings visible). Condition: Used, sold as-is with light surface oxidation and shop soil, no damage noted. Approx. 15 in long, 4 in head width, 1 in thick, with ~1-3/4" square drive pocket. Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase. Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.