Very easy to use and includes instructions. Sealed box contains six (6) bottles test solutions; each bottle contains 1/2 fluid oz (0.50 fl oz) FRESH 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 stone and files are brand new, and will last many uses. Test stone measures 2" x 2" (inches) diameter, and the file measures 5.5" (14cm) length; files come in a variety of shapes for a variety of methods/applications. DigiWeigh 100AX jewelry scale retails for $79.00! Just check their site to see for yourself. 100 x 0.01g, and enables you to choose from Grams (g), Ounces (oz), Carats (ct) and Grains (gr/gn). Scale capacity/Accuracy: 100/0.01 g, 3.527/0.0005 oz, 500/0.05 ct, 1542.8/0.2 gr. This electronic scale is perfect for loose diamonds & gemstones, scrap jewelry, coins, small postal shipments, and much more. Use the FREE solid silver sample and gold-clad bar to demonstrate test/weigh procedures, or simply keep as investment or collectors piece. Samples include one (1) solid piece: a mini solid 999-fine silver bar weighing 5 grain (5gr); also a plated bar: 24k-pure gold-clad American Indian bar replica that weighs 5 gram (5g). Very easy to use. Popular among professionals, hobbyists, coin enthusiasts, business owners, and students alike. Unique combination. Great gift idea. Excellent tools. Excellent Value.