Proto J7178P Extension Impact 3/8 inch Drive 12 inch

• Use extensions to gain access to fasteners in locations that would otherwise be difficult to reach.

• Male square is oriented in line with female squares for use with fixed head torque wrenches.

• Full chamfer at drive opening (when applicable) for easy engagement with drive tools.

• Drive end chamfer and four detents help provide quick positive engagement with drive tool on any of the socket drive walls.

• Size stamped on tool for easy identification.

• Side locking hole.

• Proto Tools have been manufactured in the USA for over 110 years, made to standards suitable for stringent aerospace requirements and heavy mining applications.