100% brand new and high quality Instructions: 1. Place the adjustment ruler on the turntable shaft of the record player. 2. Move the gauge and the arm to drop the stylus at point A. 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. 3. Move the gauge and the arm to drop the stylus at point B. Check that the leading edge of the cartridge is square with the grid lines on the scale. 4. Repeat steps 2 & 3 until a square is formed at two points. Simply loosen the screw to move the cartridge, and after tightening, tighten the cartridge fixing screw. Features: 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. Adjustment Ruler only, other accessories demo in the picture are not included! Specification: Material: Acrylic Type: Accessories Color: As Pictures Shown Dimenison: 157x35mm/ 6.18x1.38in Quantity: 1 Set Note: 1.No retail package. 2.Please allow 0-1cm error due to manual measurement. plz make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 Pc x Adjustment Ruler 1 Pc x Storage Box 1 Pc x Cleaning Cloth