When you need to connect a 1.5in and a 2in vacuum hoses together, this stainless steel joiner will do the job quick and easy. Just push one end of your vacuum hose over one side of the stainless steel joiner and push your 2nd vacuum hose over the other end. You are now joined. The stainless steel joiner has ribbed ends to allow secure connection that will not accidentally pull apart. However, this stainless steel joiner also offers easy disconnect unlike screw connectors.