Citrus juicer,orange Juicer,lemon juicer,lime juicer,grapefruit juicer. A orange juicer is used for squeezing juice from soft-centered, citrus fruits (orange, lemon,lime, grapefruit). It has a conical ridged center. Centering the halves of fruit with their cut-side down over the juicer, a user presses the fruit down and turns the fruit back and forth to extract juice, discarding the fruit afterwards. Pulp and seeds are retained in the ends.