This Williams’ XOEE series, which is their line of extra‑offset, single‑size, open‑end wrenches. These were designed for tight, recessed, or obstructed fasteners where a normal open‑end wrench simply can’t reach. This is a dual‑head specialty wrench.

The Williams XOEE‑Mini-Wrench Series is a scarce and highly desirable example from Williams’ extra‑offset specialty wrench series, built for precision work in aviation, ignition systems, carburetion, and instrument service. Featuring an open‑end on one side and a 6‑point box end on the other, both with Williams’ signature extra‑offset geometry, this tool was engineered for fasteners buried deep in confined or obstructed spaces where standard wrenches simply cannot reach.