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Impact Socket 1" to 21 mm Square 4‑Point JCB (model JCB-4819021)
Summary description:
JCB impact socket, model JCB-4819021, converts a 1" drive to a 21 mm square output with a 4‑point configuration. Designed for use with impact wrenches and heavy-duty power tools, this hardened socket provides a secure fit for fasteners and torque transfer. Suitable for automotive, construction, and industrial maintenance where impact-rated accessories are required.