The Plumber's Choice 1-1/4 in. Hinged Split Ring Pipe Hanger, Malleable Iron Clamp with 3/8 in. Rod Fitting, for Suspending Tubing (5-Pack) 114HSHB-5 - The Home Depot
The "Clamp" Puts A Pipe Clamp On Your Finger. Is Industrial's Take Of A Ring At Its Very Best - SHOUTS