The CONSTANT TORQ CLAMP 2-1/4 - 3-1/8 features a patented belleville spring design that eliminates "cold flow hose leaks" by automatically adjusting the diameter for hose compression set or expansion/contraction due to temperature changes. This all-stainless steel construction clamp is recommended for bus, truck, and heavy-duty equipment air intake and coolant connections, and is specified by many top fleets for new vehicle installations. The extended inner liner covers worm gear slots to protect against extrusions and damage, and the extended adjustment range permits fewer stocked parts for complete coverage. This practical and reliable clamp fits most makes and models, making it a valuable addition to any fleet.