Armstrong 38-321 Deep Length Drive Socket, Metric, 21 mm 12 Point Socket, 3/8 in Square Drive

Armstrong Drive Socket, Deep Length, Measurement System Metric, 3/8 in Drive, Square Drive, 12 Point Socket, 21 mm Socket, 2-1/2 in Overall Length, 3.205 in Drive End Width, 3.205 in Socket End Width, 0.772 in Bolt Clearance Depth, 1-1/2 in Opening Depth, Ball Locking, High Alloy Steel, Chrome Plated