The protractor LP is CAD designed tool to help for proper/fine cartridge adjustment.

It include Baerwald, Loefgren and Stevenson protractors, you just have to chose one, or try to make an approximation between three.

Detailed user manual is printed next to the protractors for easy set-up.

With precisely punched center hole and accurately printed on heavy paper, laminated on both sides, it should provide an excellent tool to any discerning turntable user.