The diamond tip must be set orthogonally to vinyl for accurate performance. The body of the cartridge is built orthogonally when the upper lines of the angle are parallel to the surface of the vinyl. From this angle setting, azimuth is the front line horizontality of the cartridge and vertical tracking angle (VTA) is the side line horizontality of the cartridge. Our Nasotec Azimuth & VTA Alignment block is the best tool for easy adjustment. The level of our Nasotec Azimuth & VTA Alignment Block is to check if your turntable is in balance for optimal performance and to adjust it if it is needed. So you will have two tools in one.