The Beta Tools of Italy Flexible Nut Driver, No. 943, can reach fasteners that have obstructions that do not allow solid nut drivers to reach them. This tool is ideal for those hard-to-reach hose clamps on some vehicles. The handle is made of a durable composite plastic material that is tough enough for extreme conditions and it comes with a convenient through-hole on the end of the handle. This comes in six metric sizes: 5mm, 5.5mm, 6mm, 7mm, 8mm and 10mm. The sizes are marked on the socket head and also on the top of the handle so you can identify the size when the tool is in a drawer or tool holder.