This commercial grade 3/4" FHT swivel Spin-Loc adapter is used to connect the end of 3/4” drip tubing into a male hose thread adapter, faucet, filter or pressure regulator to start a drip system. To use this Spin-Loc fitting, push the drip tubing over the barb with the "O" ring and thread the sleeve over the drip tubing to secure. The tight seal for the Spin-Loc fittings is ensured by the rubber "O" ring on the barb, which provides a quality water-tight connection.