The hose clamp designed with a worm gear mechanism to adjust the clamp’s diameter to precisely apply sealing pressure. It attaches hoses for fitting hoses in confined spaces to prevent flow leakage. Powerful function: Adopts an open inner and outer ring structure and fastened with bolts. Smooth surface, torsion-resistant and pressure-resistant, tightly locked and large adjustment range. Provides an excellent seal with a variety of hose materials, effectively solves the problem of liquid and gas leakage of the hose.