Line Capacity：3/4"~3" Cable: 1/4", 5/16" or 3/8"(HE) For kitchen, bathroom, laundry drains, and lines up through 3" in diameter. The Super-Vee has a patented Slide-Action Chuck built right into the grip shield. Just slide it back to grip the cable; forward to release it. Automatically adjusts for different size cables.