Protractor Alignment Tool Turntable Phonograph Record Cartridge Stylus<br> Features:<br> Helps eliminate tracking errors, especially on the inner grooves of the record.<br> Clear and accurate calibration allows you easy to read data.<br> Features mirror surface with printed directions on back.<br> Ensures proper cartridge alignment for optimal sound. "<br> How to Use:<br> 1. Place the calibration ruler on the turntable shaft of the record player.<br> 2. Move the gauge and the arm to drop the stylus at point A.<br> 3. Adjust the angle of the head so that the leading edge and the horizontal line on the scale are kept horizontal, which is more conducive to the mirror reflection.<br> 4. Move the gauge and the arm to drop the stylus at point B.<br> 5. Check that the leading edge of the cartridge is square with the grid lines on the scale."<br> Specifications:<br> Material: Acrylic<br> Pacakge include:<br> 1* Calibration Ruler<br> 1* Cleaning Cloth