Protractor Adjustment Tool With Mirrored Surface For Precision For Turntable Product Details 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?. Your cartridge alignment is now optimized for playing of standard 12" LP record. Enjoy the music! Package includes: a piece of Cartridge Alignment Protractor and a cleaning cloth Material: Acrylic Size : 15.5cm*3.5cm Thickness : 3mm Protect records: A poorly aligned cartridge can cause the needle of your turntable to drag against and cut into the grooves on your vinyl, causing unnecessary damage to your collection.Avoid distortion and maintain high quality sound. Protect records: A poorly aligned cartridge can cause the needle of your turntable to drag against and cut into the grooves on your vinyl, causing unnecessary damage to your collection.Avoid distortion and maintain high quality sound. If there are any problems with the product, please contact us and we will solve any problems for you. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.