57 Series Worm Drive Clamp,2 3/4" Hose ID, 2 1/2"3 1/2" Dia, Steel 201/301

Helpful in hard to reach areas, they feature deep slotted screw design that prevents screwdrivers form slippage and puncturing the hose wall. Hex clamps can be installed with a screwdriver, nutdriver or socket wrench.