SK Hand Tools 40992 1/4"Dr 7" Locking Extension. Sk's locking extension feature a suregrip lock which holds the socket on the extension. This stops the problem of sockets remaining stuck to a fastener, usually in a hard to reach location. Get a sure grip on your sockets when you use suregrip locking extensions. Sk sockets have 4 recess detents in socket drive square for quick attachment.
