Hose Couplers are sleeve type couplings that fits over the OD of the sandblast hose. They are secured to the hose with wood screws. Countersunk holes on the couplings ensure that the screws fit correctly and will not be snagged while the hose is in operation. Within the ID of the hose end is a corkscrew ridge that helps to twist the coupling onto the hose and more importantly, helps to minimize the force of blow back. Hose-to-Hose or Hose-to-Pot connections are made by the 2-lug crowfoot design. No matter what the hose size, the 2-lug hose ends interchange for common connections.