Fangrui Product Details 1. Place The Protractor On The Turntable Plate With The Hole In The Spindle. 2. Move The /tonearm Until The Stylus Is Exactly In The Center Of The . . Check That The Is Square To The Outer Set Of Grid Lines. - If Not, Loosen The Mounting Screws And Gently Twist The Until It Forms A Square Shape. 3. Move The /tonearm Until The Stylus Is Exactly Centered On The Inner , Pivoting The Protractor As Necessary. Check That The Is Square To The Inner Set Of Grid Lines. - If Not, Change The Overhang (move The In Or Out Along The ) Until The Is Square. 4. Repeat Steps 2 And 3 Until The Is Square At Both Points. Tighten The Installation And Recheck As Above. Remove The Protractor. Relax And Enjoy! High-contrast Alignment Protractor Improves Visibility And Eliminates Tracking Errors. Avoid Overshoot Distortion To Maintain High-quality Sound Link To The Turntable Setup Guide With Instructions Printed Directly On The Protractor. Material: Plastic Color: White Package Contents: 1 X Stylus Alignment Protractor Only