The Pocket Socket is a 4-in-1 telescoping nut and bolt driver. No more looking for the right tool for the job! Just pick up your Pocket Socket and you've got it. No larger than any one nut driver. To change sizes, simply push the long end in and pull the other end out until it locks.
Sensible Products® 4-in-1 Pocket Socket Tool, 1/4, 5/16, 3/8, 7/16 in