ABS construction This bubble level is built from rugged ABS material for outdoor use, delivering longlasting reliability in diverse conditions. Easy application Attach the level to your bowstring or arrow with ease, enabling quick setup and straightforward checks of alignment without complicated procedures. Tuning accuracy Helps you position the nock consistently, improving bow tuning and mounting experience with repeatable results. Alignment functionality Checks both vertical and horizontal alignment, ensuring accurate nock and sight alignment for consistent targeting. Use scenarios At the archery range during tuning, quickly verify nock and sight alignment after adjustments. In the field or during practice, confirm bowstring alignment between shots to maintain tuning. After replacing components (string, sights, or arrow), recheck alignment to ensure reliable performance.