Worm Drive Clamps for 3/8 or 1/2 Inch ID Tubing - Kegco
The Plumber's Choice 1/2 in. Hinged Split Ring Pipe Hanger, Copper Epoxy Coated Clamp with 3/8 in. Rod Fitting, for Hanging Tubing (10-Pack) 12HSHCP-10 - The Home Depot
The Plumber's Choice 2 in. Hinged Split Ring Pipe Hanger, Galvanized Iron Clamp with 3/8 in. Rod Fitting, for Suspending Tubing (5-Pack) 02HSHG-5 - The Home Depot
SharkBite 3/8-in (1/2-in O.D) Stainless Steel PEX Clamps (10-Pack) in the PEX Pipe, Fittings & Specialty Tools department at Lowes.com