Features 1??Can be used for jewelry ring measuring, including diamond tester pen, magnifier and other tools. 2??Delicate handle of the ring mandrel, accurate and efficient for ring size measuring. 3??Diamond tester pen used for jewelry display or identification assistance, can directly display the light color effect. 4??Professionally measuring rings and having a magnifying glass, an essential set of tools for making jewelry. 5??Complete measuring tools, ideal for professionals and jewelers or amateurs at home. 6??Come with delicate PU leather storage case, including measuring ruler, measuring stick, tweezers, magnifier, jewelry ring mold and so on. Specification Condition: Item Type: Jewelry Test Tool Material: Plastic + Copper Usage: Professionally used to measure the ring size, with a magnifying glass , it is an indispensable set of tools for making jewelry, more convenient for you to use, and it is also a good choice for gifts Accessories: measuring tape, diamond tester pen, ring mandrel, tweezers, diamond claw, magnifying glass, diamond tester, ring mold, etc Detailed introduction Diamond Tester Pen: Powered by 2pcs AAA batteries (not included) Purpose: To observe the effect of diamond light color. Usage: Control the switch and turn on the tester pen. Use the tester pen to illuminate the diamond color edge in parallel to achieve the ideal observation effect of light color. (The reflection surface of cut diamond is flat and the effect of light color is apparent) (The reflection surface of cut diamond is less or uneven, and the effect of light color is not apparent) Diamond Tester: Powered by 9V battery (not included) Use steps: 1. Turn on the power switch, the power indicator lights up, and the instrument begins to warm up. After a few seconds, the preparatory indicator lights up, indicating that the instrument can be used 2. According to the weight of the diamond being tested and the temperature of the measuring place (see table on the back of the instrument), turn on the three-color indicator light.For example, if the weight of the subject is less than 0.05 carats and the temperature is less than 10??, the light will be turned on to the 5th tricolor position To test jewelry, use glass correction instrument before test. The specific correction method is as follows: first, turn on the machine to preheat, then use the probe of thermal conductivity probe to vertically contact the glass surface, manually adjust the lamp to the 5th grid, and immediately after the correction, contact the probe with the surface of the object to be tested to get the accurate hardness To test the hardness of jewelry, the sixth light shows that the jewelry is of high quality, and the hardness of ordinary stone is about 4-5 To test the crystals, a sixth lamp lights up, indicating that the substance is between 6 and 7 hardness, which is consistent with the properties of the crystals 3. Remove the needle cover and hold the instrument. Touch the conductive plate of the back cover of the instrument with the index finger of the right hand to make the probe touch the diamond vertically.Pay close attention to the reactions of the instrument, if the remaining color lights up to the ninth or more than nine until the red diode shines and emits a buzzer, it is a real diamond.On the contrary, if the number of lights is less than nine or the instrument does not sound, it is a false one. Note: 1. Do not use instruments to test metals 2. Do not touch the probe with hands or wet objects 3. The tested objects should be kept clean and free of oil stains 4. The instrument and diamond should be at the same temperature during the test 5. Do not wear gloves, it will make the buzzer invalid. Attention when using diamond tester : 1. The results are meaningless if the temperature is below ?10??or above 40?? 2. It is best to measure under conditions of no wind 3. Ensure that the tested object has been placed in the test environment for a long enough time and the surface temperature is consistent with the ambient temperature 4. The surface of the tested object should be clean. Waxing and oil will affect the result 5. The surface is flat to ensure full contact between the probe and the surface 6. Use glass for calibration before formal test 7. Note that the fourth light is just on and the fifth light is about to go on, representing 4?4.5 and 4.5?5 respectively Package List 2 x Ring Measuring Tape 1 x Tweezers 1 x Diamond Claw 1 x Ring Mandrel 1 x Ring Clip 1 x 30X Magnifier 1 x Diamond Tester 1 x Diamond Tester Pen 1 x Ring Mold 28# 1 x Ring Mold 27# 1 x Ring Mold 26# 1 x Ring Mold 25# 1 x Ring Mold 24# 1 x Ring Mold 23# 1 x Ring Mold 22# 1 x Ring Mold 21# 1 x Ring Mold 20# 1 x Ring Mold 19# 1 x Ring Mold 18# 1 x Ring Mold 17# 1 x Ring Mold 16# 1 x Ring Mold 15# 1 x Ring Mold 14# 1 x Ring Mold 13# 1 x Ring Mold 12# 1 x Ring Mold 11# 1 x Ring Mold 10# 1 x Ring Mold 9# 1 x Ring Mold 8# 1 x Ring Mold 7# 1 x Ring Mold 6# 1 x Diamond Loup