Description: Cartridge Stylus Alignment Protractor Adjustment Tool Phonograph Accessories. Features mirror surface with printed directions on back. Clear and accurate calibration allows you easy to read data. Helps eliminate tracking errors, especially on the inner grooves of the record. Ensures proper cartridge alignment for optimal sound. Works with any standard 1/2" mounted cartridge from any brand. Specification: Material : Acrylic Color:Clear How to use 1. Place the protractor on the turntable spindle. 2. Move the protractor and the arm so that the stylus is directly above point “A”. 3. Move the protractor until cross lines are parallel to the sides of the cartridge . 4. Repeat steps 2&3 above point “B”. 5.If the angle noted at point “B”is not the same as the angle at point “A”, move the cartridge forward or backward and twist the cartridge to bring to the same angle at both “A”and “B”. Size Chart: 15.5x3.5cm/6.10x1.38inch 3mm/0.12inch Package Includes: 1 piece Alignment Protractor Tool Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!