The Worm Gear Hose Clamp 1/2" W, 2-1/4" ID from Grainger is a worm gear style hose clamp with a band width of 1/2" and an internal diameter of 2-1/4". It is constructed of 201 stainless steel for corrosion resistance and has a worm gear screw for tightening. The clamp has a tensile strength of 11,000 psi. It comes in a pack of 10 clamps. The clamps provide a heavy duty, reliable connection for hoses, tubing, and fittings.