Assortment- Worm Gear ClampSold in sets of 1 A worm gear clamp is a type of hose connector that consists of a ring shaped piece of metal with a captive screw. You can change the diameter of a worm gear clamp's opening by turning the screw. Tightening the screw will result in a larger diameter, whereas loosening the screw will result in a smaller diameter. To use a worm gear clamp, place it around the hose and then tighten the screw. As the diameter of the worm gear clamp