• 1/2-inch drive extension bars with unique socket lock mechanism: attaches socket so it stays on until you take it off
• No more aggravation from sockets dropping off the extension into hard-to-reach dark holes.
• Works with any 1/2-inch drive socket, shallow or deep, thin- or thick-wall
• Heavy-duty hardened Chrome-Vanadium steel for extra strength; mirror-chrome anti-corrosion finish
• Set of the 3 most commonly-used extension bar sizes: 3-inch, 5-inch and 10-inch