1. Dual Size Options: This innovative bow guide manual offers two size options, accommodating both 1/8 1/4 violins and 1/2 4/4 violins. This versatility makes it an essential tool for players of various skill levels, ensuring that both beginners and experienced musicians can achieve proper care and technique. 2. UserFriendly Design: The hookandloop fastener design provides a simple and effective way to attach and remove the tool from your bow. This thoughtful feature allows for effortless setup, enabling beginners to focus on their practice without the distraction of complicated equipment adjustments. 3. Enhanced Training Experience: This tool is specifically designed for selfcorrection, helping to cultivate proper bow and wrist movements. By using the collimator, players can develop muscle memory for correct technique, making their practice sessions more productive and efficient. 4. Reliable and Safe Material: The transparent component of the collimator is constructed from sturdy, durable plastic, ensuring visibility and reliability during use. The adjustable strap is meticulously crafted to remain intact through repeated use, safeguarding your instrument while providing both safety and peace of mind.