Apex UG-EX-508-4 1/2" Drive Extension

Apex UG-EX-508-4 1/2" Drive Extension

The Apex UG-EX-508-4 is a 4-inch socket extension built from durable alloy steel with a urethane-covered finish. It features a 1/2-inch square input drive and a female hex output drive designed for six-point sockets. A pin retainer secures the socket during use, while the anti-mar cover helps protect surrounding surfaces. This single-piece tool is rated for impact applications.

Mechanics needing reach in tight engine bays

Technicians working on deep-set fasteners will benefit from the four-inch extension length and impact-rated construction. The urethane coating reduces surface damage when working near finished panels or painted components. Buyers who require a longer reach or a different drive size should look at other options, as this model is fixed at 4 inches and 1/2-inch drive only.

1/2-inch drive with pin retainer

The 1/2-inch square drive input and female hex output determine socket compatibility, accepting standard six-point 1/2-inch drive sockets. The pin retainer mechanism locks the socket in place, preventing accidental release during high-torque or impact work. Verify that your existing socket set uses this drive configuration before purchase.