Description: 【Precision Alignment Tool】This Turntable Phono Cartridge Stylus Alignment Protractor is an essential tool for vinyl enthusiasts, designed to ensure precise alignment of the cartridge stylus for accurate sound reproduction and a richer listening experience. 【For Clearer & Better Sound】 By providing accurate stylus placement, this protractor helps in reducing distortion and stylus wear, avoids the overshoot distortion to keep high quality sound. 【Universal】This alignment protractor is widely applied for both vintage and modern record players, works with an S -Shaped arm and 1/2" mounted cartridge. 【High Quality and Precision】 Made from high quality acrylic materials, size: 19cmx4cm. Calibration Protractor is great tool for alignment of new stylus. 【Easy to Use】 The protractor is easy to use even for beginners. Pratical stylus alignment protractor adjustment tool. Specification: 1. Place this protractor on your turntable platter with hole over spindle. 2. Move cartridge/ tonearm until stylus rests exactly on center of . 120.9mm radius. Check that cartridge is square with outer set of grid lines. - If not, loosen cartridge mounting screws and twist cartridge lightly until it is square. 3. Move cartridge/ tonearm until stylus rests exactly on center of inner (66.04mm radius), Rotate protractor around spindle as required. Check that cartridge is square with inner setting of grid lines. - If not, change overhang, (move cartridge in or out along the axis) until cartridge is square. 4. Repeat step 2 and 3 till cartridge is square on both points. Tighten mounting, and recheck as above. Remove Protractor. Size Chart: Material: Acrylic Size: 19cmx4cm/7.48inchx1.57inch Package Includes: 1 Piece Turntable Phonograph Stylus Alignment Protractor Note: Please allow slightly errors due to manual measurement and different monitors.