When referring to something that is useful or convenient, the phrase "be handy" is commonly used. However, there are a number of synonyms that might also convey this idea, depending on context and tone. Some options include "come in handy," "be of service," "be convenient," "be practical," and "be useful." Additionally, "be helpful," "be accessible," "be functional," "be beneficial," and "be advantageous" are all possible alternatives. Depending on the speaker's intention, any of these synonyms might be more appropriate than "be handy," and choosing the right one can help to better convey the intended meaning.