- Improves shooting accuracy by helping determine the correct tail position and D-loop ring alignment for more precise shots. - Lightweight and portable accessory that makes it easy to achieve the perfect nock position with different arrows. - Simple to use: hang on the bowstring or on the arrow, and check that the bubble is between the lines to verify vertical and horizontal alignment for nock and sight placement. - Suitable for compound bows, with an adjustable spring length to fit different setups and compatible with arrows of various diameters. 2-3 practical use scenarios - Regular practice sessions to quickly tune and verify consistent nock and sight alignment, reducing shot deviation. - Switching to arrows with different diameters or nock sizes; adjust the tool and recheck alignment to maintain accuracy. - Pre-competition setup to confirm bow alignment and nock positioning, ensuring reliable performance under match conditions.