["brand new and high quality\r\n\r\nInstructions: \r\n1. Place this protractor on your turntable platter with hole over spindle. \r\n2. Move cartridge/ tonearm until stylus rests exactly on center of bulls eye. (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.\r\n3. Move cartridge/ tonearm until stylus rests exactly on center of inner bulls-eye (66.04mm radius), Rotate protractor around spindle as required. Check that cartridge is square with inner set of grid lines. - If not, change overhang, (move cartridge in or out along the axis) until cartridge is square. \r\n4. Repeat step 2 and 3 till cartridge is square at both points. Tighten mounting, and recheck as above. Remove Protractor. Relax and enjoy!\r\n\r\nFeatures:\r\nHigh contrast cartridge alignment protractor provides improved visibility and eliminates tracking errors.\r\nAvoids the over-shoot distortion to keep high quality sound\r\nLink to turntable setup guide with instructions included, printed directly on the protractor.\r\nWorks with an S -Shaped arm and any 1/2\" mounted cartridge.\r\nfor Extra magnifier make you more clear when adjusting the overhang.\r\nCalibration Protractor only, other accessories demo in the picture are not included!\r\n\r\nSpecification:\r\nMaterial: Acrylic\r\nType: Accessories\r\nColor: White\r\nSize: One Size\r\nLength: 18.9cm/ 7.44in\r\nWidth: 4.0cm/ 1.57in\r\nQuantity: 1 Set\r\n\r\nNote:\r\n1.No retail package.\r\n2.Please allow 0-1cm error due to manual measurement. plz make sure you do not mind before you bid.\r\n3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\r\n\r\nPackage includes:\r\n1 Pc x Overshoot Protractor\r\n1 Pc x Magnifier"]