For MM/ MC/ MI and piezoelectric acoustical pickup, the tray made of Aluminum, nonmagnetic, no magnetic field adhesivity, reading reliable and to ensure accurate measurement. Range: 100g, resolution up to 0.005g. High precision and accurate stylus gauge for accurate stylus force adjustment.Accurate stylus force is important for ensuring the playback result and life of your valuable records and cartidge. This gadget would help to protect your precious vinyl records, because too high stylus force results in shortened record/stylus life while too low stylus force result in easy mistracking and both of the cases with come into poor audio performance. .