Everyday professionals and hobbyists all over the world use these exact tools to evaluate the coins and other precious metals they invest in. Measure the weight of your samples with the scale. Test the purity of your metals with the safe and easy acid & stone test. Very easy to use and includes instructions. Sealed box contains six (6) bottles test solution; each bottle contains 1/2 fluid oz (0.5 fl oz) test acid. You will receive one 10k solution, one 14k solution, one 18k solution, one 22k solution, one Silver solution, and one Platinum solution--each new in box sealed with shrink-wrap. Test stones and file are brand new, and will last many uses; you'll receive one 6"x3" (inches) stone and a 2" x 2" stone; file measures 5.5 in. (14cm) in length. Digiweigh 100AX is the perfect scale for weighing coins, scrap jewelry, small postal shipments, and more; Enables you to choose from grams, ounces, carats, and grains; capacity/accuracy: 100/0.01 g, 3.527/0.0005 oz, 500/0.05 ct, 1542.8/0.2 gr. Popular among professionals, hobbyists, coin enthusiasts, business owners, and students alike. Excellent tools. Excellent Value.