Oetiker clamps provide a permanent clamping solution! This style of clamp has a 1-ear design, which means they are crimped at a single point on the clamp to create a superior seal over your tubing. These large Oetiker clamps are often used on 5/16" thick-walled tubing that is used in CO2 connections on kegging and draft systems. These clamps hold tight, creating a great seal that holds for a long time! Some people prefer these for more permanent systems. If you are looking to switch over to a snug seal that lasts, make sure you use Oetiker clamps!