and high quality 1. Place the protractor on the turntable plate with the hole aligned to the spindle. 2. Move the tonearm until the stylus is exactly in the center of the outer grid. Check that the tonearm is square to the outer set of grid lines. If not, loosen the mounting screws and gently adjust the cartridge until it forms a square alignment. 3. Move the tonearm until the stylus is exactly centered on the inner grid, pivoting the protractor as necessary. Check that the cartridge is square to the inner set of grid lines. If not, adjust the overhang by moving the cartridge in or out along the axis until proper alignment is achieved. 4. Repeat steps 2 and 3 until the cartridge is square at both the inner and outer grid points. Tighten the mounting screws and recheck alignment. Remove the protractor. Enjoy your music. High-contrast alignment protractor improves visibility and helps eliminate tracking errors. Reduces distortion to maintain high-quality sound. Turntable setup guide link and instructions printed directly on the protractor. Material: Plastic Color: White Package Contents: 1 x Stylus Alignment Protractor Note: Light reflection and different displays may cause slight color variation between the image and the actual item. Measurement may vary by +/- 1-3 cm.