Used with drip irrigation to control or shut-off water supply in 1/4" drip micro tubing or 1/4" soaker hose dripline. Also works as a coupler between lengths of 1/4" tubing. Connects to 1/2" or 3/4" drip poly tubing as well. Use a hole punch to make the proper hole in the tubing. Excellent when watering garden boxes, hanging baskets, flower pots, and vegetable gardens. No glue or lubricants are required.