BAERWALD CARTRIDGE ALIGNMENT PROTRACTOR. Set up and align your cartridge with a Cartridge Protractor! Easy to follow instructions on the back. Mirrored finish allows you to precisely fix the stylus. Proper setup and alignment is crucial to get the most out of your turntable. This protractor will last forever and is a fraction of the cost of most alignment tools. Place this alignment gauge over your turntable spindle, move your phono cartridge over the grid, and make sure it is correctly aligned before tightening it to your tonearm. Couldn’t be simpler. Gives precise alignment for better sound and longer stylus life. Made of durable 2mm ABS plastic with mirrored finish. Allows you to precisely adjust your cartridge/stylus by providing clear bottom view and top view simultaneously.