Nagerun Super Long Can be used for throwing and batting. My son mainly used it for batting, along with Nagerun. Nagerun is a throwing enhancement item created by Yasuyuki Imato's baseball theory, the "Imato Method." ・You can learn the correct posture and body mechanics for throwing. ・Unlike throwing practice with a ball, it doesn't hurt your shoulder or elbow. ・You can practice alone, at home. Instant purchase OK.