The Jeweler's Tool Pack is an essential tool for anyone in the precious metal industry. The unsurpassed accuracy of the DigiWeigh name proves itself with the DW-100AX. This scale measures in four separate units: Grams (g), Ounces (oz), Carats (ct), and Grains (gr/gn) with Scale Capacity/Accuracies of 100/0.01 g, 3.527/0.0005 oz, 500/0.05 ct, and 1542.8/0.2 gr. Also comes with ONE (1) of each 10K, 14K, 18K, 22K, and Silver Acids, 2 stones, a 10 pack of files, Cover/Extension Tray, 2x AAA batteries, 1x 100g calibration weight, and a LIFETIME WARRANTY!!!!