Look at its versatility. You can drive 5/8″ cables for lines up to 3″ and 7/8″ cables for up to 4″ lines – and you can switch from one to the other in seconds, without touching the jaws, without an adapter, without tools. And for sink drain work, slip on a drum that holds smaller cables.From the ManufacturerLook at its versatility. You can drive 5/8″ cables for lines up to 3″ and 7/8″ cables for up to 4″ lines – and you can switch from one to the other in seconds, without touching the jaws, without an adapter, without tools. And for sink drain work, slip on a drum that holds smaller cables.