A worm gear clamp loses tension as the hose takes a set and the rubber cold flows, which is why coolant hoses seep after a season. A heat shrink clamp is applied with a heat gun and then holds its grip continuously, so there is nothing to go back and retighten and no screw head to catch a knuckle on.

Edelbrock 8461 Power Grip Hose Clamp Details:

• Fits hose outside diameters from 1.75 in. to 2.00 in.
• Thermoplastic construction, black.
• Heat shrink adjustment type, applied with a heat gun.
• Maintains constant tension with no periodic retightening.
• Single use item, so plan on a new clamp if the hose is removed.