Sturdy steel construction provides exceptional durability and long-lasting performance, making this collimator a reliable accessory for instrument practice. Dual-track design with a two-stage setup and convenient double sockets allows easy insertion of the steel rod into the matching sockets. Grooved plastic card stickers ensure a stable and straightforward installation. Specifically developed for bow pliers, this collimator is a highly effective accessory that helps beginners practice their violin skills. It enables practitioners to focus on rhythm and intonation and improve overall technique. Use scenarios - At home practice to improve bow alignment, timing, and intonation during routine drills. - In lessons to help maintain consistent bowing technique and rhythm across exercises. - As a quick warm-up before performances or during travel to sharpen timing, tone, and control.