DescriptionThe vernier micrometer is widely used for measuring of industrial accessories, handicraft, pearls and jewels. It can measure inside, outside, depth and step size with two sets of jaws and the probe. I believe that will be a good idea, if you could give your children a handmade necklace as birthday gift, which is made of pearls in oysters. The micrometer caliper will help you a lot, it is a good partner of pearl drill.Features- Color: Blue - Material: Plastic carbon fiber composites - Size: 17cm(Length) - Made of strong Plastic carbon fiber composites, lightweight and durable - Two way measurement, internal and external - Linear capacitive measuring system - Zero setting in any position - With easy to read large LCD display - Minimum scale to read is 0.1mm / 0.01 inch - An tool for a broad range of industrial and automotive applicationsSpecifictions- Measuring Range: 0-100 mm / 0-4 inch - Resolution: 0.1 mm / 0.01 inch - Repeatability: 0.1 mm / 0.01 inch - Maximum Measuring Speed: 1.5 m / sec or 60 inch / sec - Display: LCD screen - Power: One Battery (not included), LR44 / SR44 1.5V or CR2032 3V - Total size: 235 x 77 x 15 mm / 9.25 "x 3.03" x 0.59 "(approx.) - LCD display size: 40 x 15 mm / 1.57 "x 0.59" (approx.) - Main Color: Black - Quantity: 1 PcNotes- Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon. - Due to the difference between different monitors, the picture may not reflect the actual color of the item.