The S-3300-WR is a deep socket wrench designed for installing and tightening the dome nuts on strain relief fittings. Manufactured from lightweight alloy steel, this tool is specifically sized for PG 21, 3/4" NPT, and M25 fittings, featuring a wrench flat of 1.30 inches (33 mm) and a total length of 2.36 inches (60 mm). A key feature is the slit along its full length, which allows the wrench to be used over an already installed cable. The tool encloses the dome nut on five sides, providing additional rigidity during tightening. This design is especially beneficial when working with stiff cables, ensuring a secure installation.