M5×12mm. Roland Digital Music Education is a training school dedicated to developing modern digital music education in China. The school has first-class teaching environment and equipment. The screw specification of Roland electronic drum support frame sold by it is M5× 12mm, authoritative professional teaching materials, expert teacher echelon, high-quality, standardized and personalized school running, and various electro-acoustic professional courses are offered for preschool children, teenagers, white-collar workers and the elderly. Creative group class and group class teaching mode, Roland digital music education will make more people feel the charm of music, share new knowledge of music and make unremitting efforts to train more musicians with the help of world-class ATV electroacoustic instruments.