Flexible Hose Clamp Driver - Stop using that old, rigid nut driver and add some flexibility to your work. The flexible shaft and slipless grip provide 90-degree work access and are best in tight spaces such as compact car and boat engines, as well as plumbing repair applications. The socket fits mini and standard hose clamp screw heads. Just flip the socket for the desired size of 1/4 in. or 5/16 in.