Zephyr Socket Extension, 7/16” Hex to 3/8” Square, Pin-Type Retainer Description:

Zephyr Extensions are heat treated in small lots to guarantee consistent quality. Zephyr’s unique Z-Forge process assures an exact dimensional fit in the recess. Zephyr Extensions will give you the truest fit, longest performance and the least cam-out and product damage of any available extension at any price. Zephyr Extensions have served the aerospace and automotive industries with high quality, technically innovative tools produced in a manufacturing environment that features intense quality control and superior customer service.