The Snap-on Tools Empty Tray 106btmx 1/4 inch 6 piece extention set is a high-quality hand tool set designed for automotive use. With a drive size of 1/4 inch, this set includes six extensions that are essential for accessing hard-to-reach areas in the engine compartment. The Snap-on brand is known for its durability and reliability, making this set a valuable addition to any mechanic's toolbox.