The Proto 3/8-inch Drive Impact Extension provides 3 inches of reach to access fasteners in tight or hard-to-reach locations. The male square is oriented in line with the female square for compatibility with fixed-head torque wrenches, while the full chamfer at the drive opening ensures easy engagement with drive tools.
Four detents and a drive end chamfer deliver quick, positive engagement on any socket drive wall for secure, reliable operation. A side locking hole adds extra retention, and the size is stamped directly on the tool for instant identification on the job.