First, if you have the space, carpenter clamps are the easiest and safest way to install. These clamps barely fit a 1.5" coolant hose. You need to fully compress it so that 1.5 inches will stretch. THIS WILL NOT WORK WITH AN EXPLOSION FITTING THAT REQUIRES 1.5" HOSE. Again, it will fit a 1.5" hose, NOT a flare fitting. Look elsewhere if your hose is larger than 1 .5" is. This listing should be flagged as false advertising. In terms of durability and construction, they are bulletproof. They will